What does fap mean?
Fap is a modern English slang term meaning to masturbate, used primarily of males, whether as a verb ('he faps') or, less commonly, as a noun for the act itself. The word originated as an onomatopoeia — an imitation of the sound associated with the activity — and circulated in online communities and imageboards in the early 2000s before spreading into mainstream informal usage. It is unmistakably vulgar and colloquial: it belongs to jokes, memes, banter among friends, and adult conversation, and would be out of place in professional, academic, or polite contexts. Despite its crudeness, 'fap' is lexicographically interesting as one of the clearest examples of a word coined on the internet through sound symbolism rather than deriving from older roots; related forms such as 'fapping' are common, and phrases like 'fap fap fap' persist as a written gag. For learners, it is worth recognizing but best avoided in formal settings.
(Vulgar slang) To masturbate, used of a male.
"He jokes that his main weekend hobby is fapping."
Strictly informal and vulgar; avoid in professional or formal contexts.
(Vulgar slang) An act of masturbation, usually male.
"He went offline for what he later described as a quick fap."
Less common than the verb form.
Rare; the noun sense is much less frequent than the verb.
"The comments section devolved into nothing but jokes about faps."
'Fap' began as an internet sound effect imitating masturbation before becoming one of the most widely recognized slang words born online.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of fap
Fap is onomatopoeic in origin, coined as a written imitation of the sound of male masturbation. It emerged in internet culture — notably on forums and imageboards — around the turn of the twenty-first century, though an earlier similar usage appears in a 17th-century work as a suggested sound effect. It has no known cognates in other languages and no deeper root, making it a rare example of a word created purely by sound imitation in the digital age.
Related word forms
How fap is actually used
Strongly informal and vulgar; used almost exclusively in casual speech, online forums, memes, and humor. Not appropriate in formal writing or professional contexts. Widely understood across the English-speaking world, though it carries a distinctly internet-culture flavor.
Easily confused with fap
A 'fad' is a short-lived fashion or craze, whereas 'fap' is slang for masturbation.