An insult is an expression, statement, or behavior that is often deliberately disrespectful, offensive, scornful, or derogatory towards an individual or a group. Insults can be intentional or unintentional, and they often aim to belittle, offend, or humiliate the target. While intentional insults can sometimes include factual information, they are typically presented in a pejorative manner, intended to provoke a negative emotional response or have a harmful reaction effect when used harmfully. Insults can also be made unintentionally or in a playful way but could in some cases also have negative impacts and effects even when they were not intended to insult.
Insults can have varying impacts, effects, and meanings depending on intent, use, recipient's understanding of the meaning, and intent behind the action or words, and social setting and social norms including cultural references and meanings.
In ancient Rome, political speeches and debates were known to include strong harshness and personal attacks. Historians suggest that insults and verbal attacks were common in the political discourse of the time. This practice reflected the highly confrontational nature of political engagement in ancient Rome.
Many religious texts and beliefs have also contributed to views on insults and the implications of making insults in anger. In Christianity, for example, the Sermon on the Mount delivered by Jesus includes teachings on the significance of anger. According to Jesus, anger is likened to the act of murder, emphasizing the importance of managing one's emotions and avoiding harmful speech.
In the Gospel of Matthew, specifically in Matthew 5:22, Jesus states, "But I tell you that anyone who is angry with a brother or sister will be subject to judgment. Again, anyone who says to a brother or sister, ‘Raca,' is answerable to the court. And anyone who says, ‘You fool!' will be in danger of the fire of hell." (New International Version) This teaching emphasizes the significance of controlling one's speech and refraining from insulting others in unjustified anger." In other translations words can vary the word court is also council, or, Sanhedrin. The word "Raca" was an Arabic term of contempt that could possibly mean when used in this context "worthless", “empty headed”, "fool", or "good-for-nothing". The teachings in Christianity and the New Testament focus a large amount on forgiveness and non-judgment to others. This also promotes forgiving or possibly overlooking as written in Proverbs 12:16 or in Matthew 6:14
An example of an unintentional insult may be not tasting a dessert made by a host. Comments made carelessly can also become unintentional insults. Another example could include comments made carelessly about facial features, personality traits, personal taste (e.g. in music), underestimating personal abilities or interests, asking about involvement in something potentially creating a stereotypes, jokes, or even walking away from someone outside are among some things that may cause offence accidentally.
Lacan considered insults a primary form of social interaction, central to the imaginary order – "a situation that is symbolized in the 'Yah-boo, so are you' of the transitivist quarrel, the original form of aggressive communication".[clarification needed]
Erving Goffman points out that every "crack or remark set up the possibility of a counter-riposte, topper, or squelch, that is, a comeback". He cites the example of possible interchanges at a dance in a school gym:
- A one-liner: Boy: "Care to dance?" Girl: "No, I came here to play basketball" Boy: (crumbles)
- A comeback: Boy: "Care to dance?" Girl: "No, I came here to play basketball" Boy: "Sorry, I should have guessed by the way you're dressed".
A backhanded (or left-handed) compliment, or asteism, is an insult that is disguised as, or accompanied by, a compliment, especially in situations where the belittling or condescension is intentional.
Examples of backhanded compliments include, but are not limited to:
Negging is a type of backhanded compliment used for emotional manipulation or as a seduction method. The term was coined and prescribed by pickup artists. Negging is often viewed as a straightforward insult rather than as a pick-up line, in spite of the fact that proponents of the technique traditionally stress it is not an insult.
A personal attack is an insult which is directed at some attribute of the person.
The Federal Communications Commission's personal attack rule defined a personal attack as one made upon the honesty, character, integrity, or like personal qualities in the Communications Act of 1934.
Personal attacks are generally considered a fallacy when used in arguments since they do not attempt to debunk the opposing sides argument, rather attacking the qualities of a person.
Verbal insults often take a phallic or pudendal form; this includes offensive profanity, and may also include insults to one's sexuality. There are also insults pertaining to the extent of one's sexual activity. For example, according to James Bloodworth, "incel" “has gradually crept into the vocabulary of every internet troll, sometimes being used against men who blame and harass women for not wanting to sleep with them.” 
Insults in poetic form is practiced through out history, more often as entertainment rather than maliciousness. Flyting is a contest consisting of the exchange of insults between two parties, often conducted in verse and became public entertainment in Scotland in the 15th and 16th centuries. Senna is a form of Old Norse Eddic poetry consisting of an exchange of insults between participants.
O du eselhafter Peierl (Oh, you asinine Peierl), composed by Wolfgang Amadeus Mozart, was meant for fun, mocking, scatological humor directed at a friend of Mozart's.
More modern versions include poetry slam, dozens, diss song and battle rap.
Various typologies of insults have been proposed over the years. Ethologist Desmond Morris, noting that "almost any action can operate as an Insult Signal if it is performed out of its appropriate context – at the wrong time or in the wrong place", classes such signals in ten "basic categories":
Elizabethans took great interest in such analyses, distinguishing out, for example, the "fleering frump ... when we give a mock with a scornful countenance as in some smiling sort looking aside or by drawing the lip awry, or shrinking up the nose". Shakespeare humorously set up an insult-hierarchy of seven-fold "degrees. The first, the Retort Courteous; the second, the Quip Modest; the third, the Reply Churlish; the fourth, the Reproof Valiant; the fifth, the Countercheck Quarrelsome; the sixth, the Lie with Circumstance; the seventh, the Lie Direct".
What qualifies as an insult is also determined both by the individual social situation and by changing social mores. Thus on one hand the insulting "obscene invitations of a man to a strange girl can be the spicy endearments of a husband to his wife".