1. To really enjoy the entire experience of a delicious meal or food. 2. When a food or a meal is so yummy that it makes one feel very very happy. 3. When on really enjoys the flavor of a food or meal. 4. To be overtaken by flavor.
I just had the most marvelous burrito for lunch! It was a total yumfuck!" or "Wasn't that casserole a real yumfuck?!" or "Thanks for these delectable brownies. They are yumfucking me!
by LanguageEnhancementTeam November 02, 2010
When food is so good tasting that you would seriously fuck it if it were human.
Peter: OMW, this burger tastes so good, I'd yumfuck it.
by CaptainSuperMacAwesomeVille April 01, 2012