reverse half and half Share definition Flag a sexual act where the man begins sexual coitus and finishes with ejaculating in his partner's mouth I gave Susy a 'reverse half and half' last night! And she swallowed like there was no tomorrow.... reverse half and half by ClueMonster January 7, 2003 0 0 Get merch Get the reverse half and half mug. Buy Now — $32.95 See more merch