buttock
“Quant à mon homme, l'œil collé au trou, une main sur mes fesses, l'autre à son vit qu'il agitait peu à peu, il semblait régler son extase sur celle qu'il surprenait.” — As for my man, eyes glued to my hole, one hand on my buttocks, the other on his dick which he stimulated little by little, he seemed to direct his ecstasy on the one he surprised
Synonyms: arrière-train, cul, derrière, fesse, fessier, foufoune, meule, miche
Related: avoir le feu aux fesses, botter les fesses, chauffer les fesses, coller aux fesses, coûter la peau des fesses, de la fesse gauche, entrefesse, fessé, fessée, fesser
Inherited from Middle French fesse f, from Old French fesse f, from Vulgar Latin *fissa f (“split, cleft”), from Latin fissum n, ultimately from Proto-Indo-European *bʰidtós. Originally referred to the gluteal cleft. The verb fesser and its derivatives are etymologically unrelated and converged toward fesse in both form and sense through assimilation.