cumback Share definition Flag After a woman gives a man oral, she doesn't spit or swallow-- she proceeds to kiss the man and give him his cum back. "Dude after Stacy blew me, she gave me a cumback-- I didn't know it was that salty!" cumback by JuJuLaylayRiRi April 2, 2009 Words you can keep railfan mug chonk mug chud mug based mug 67 mug slime mug mogging mug chopped mug thot mug glazing mug huzz mug yams mug larp mug unc mug cracked mug simp mug baddie mug bop mug lolcow mug