Where does “grinfuck” come from?

grinfuck (English) comes from English fuck, from Middle English fukken, from Old Norse fukka, from Proto-Germanic fukkōną, from Proto-Indo-European pewǵ- — to punch, fist-fight; to prick, poke, stab.

grinfuck (English): To behave in a superficially polite or charming way while simultaneously acting in a deceptive, manipulative, or harmful manner

Definitions

  1. To behave in a superficially polite or charming way while simultaneously acting in a deceptive, manipulative, or harmful manner

Ancestry of “grinfuck”, step by step

grinfuck traces back through two separate lines of ancestry.

via English fuck

StepLanguageWordMeaning
1EnglishfuckTo have sexual intercourse, to copulate; To have...
2Middle Englishfukkento fuck; to beat, strike
3Old Norsefukka—
4Proto-Germanicfukkōnąto blow, gust; to strike, assail; to copulate
5Proto-Indo-Europeanpewǵ-to punch, fist-fight; to prick, poke, stab

via English grīn

StepLanguageWordMeaning
1EnglishgrīnA smile in which the lips are parted to reveal the teeth
2Middle Englishgrin—
3Old Englishgrinsnare
Every word from Proto-Indo-European pewǵ- →Every word from Proto-Germanic fukkōną →Every word from Old Norse fukka →
grinfuck — Etymology, Origin & Word History | Etymology Explorer