An allusion to anal sex, "baloney" referring to the penetrator's penis and "colonic" referring to the anal penetration itself. Commonly used by men who equate their genitalia with charcuterie and/or processed meat products.
Frat boy 1: "Yo, what was up with that chick you banged last night? She was all vegan and shit!"
Frat boy 2: "Her ass ain't vegan after the baloney colonic I gave her ..."