Added 9 October 2026
eff
/ɛf/ verb
verb Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about eff at Wordnik → Where our words come from →
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Have sexual intercourse with.
This student sleeps with everyone in her dorm
Origin
From the name of the letter f (see etymology 1), the initial letter of fuck. Compare pee.
From Wiktionary, via Kaikki.org (CC BY-SA)