"Kiss my ass" is an English expression that dates back at least to the early 20th century, with roots in older colloquial insults. It comes from the literal image of someone being forced to kiss another person's buttocks, an act meant to be humiliating and submissive, which turned into a metaphor for contempt and refusal. The phrase became common in informal speech in the U.S. and Britain as a blunt way to reject, dismiss, or insult someone. It is typically used by adults in casual, heated, or defiant interactions. The expression is clearly derogatory and offensive, though it can appear in comedic or exaggerated contexts without serious malice.

英語での「kiss my ass」の定義と意味

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