The story
From buff (“to rub”) + the + muffin (“vagina”), chosen for the rhyme in the participle ("buffin' the muffin").
Etymology from Wiktionary, CC BY-SA 4.0.
buff the muffin
Today it means: Of a woman, to masturbate. Full definition →
Today it means: Of a woman, to masturbate. Full definition →
From buff (“to rub”) + the + muffin (“vagina”), chosen for the rhyme in the participle ("buffin' the muffin").
Etymology from Wiktionary, CC BY-SA 4.0.