Top definition
A term used to describe oral sex. Typically used by people who compare sexual anatomy to that of a McChicken or a McDouble.
Charles: What the hell took you so long!?

Jolene: We were talking.

Charles: Don't lie. You were McSnackin on his penis.
by VitaminJo May 01, 2009
Get the mug
Get a McSnackin mug for your boyfriend James.