When you eat food items out of a girl's cleavage. This done by having the girl squeeze her boobs together, inserting said food items between the boobs, and then putting your face down than and chowing down. Suprisingly fun!!!
Person 1: Dude I just ate skittles out if Brooke's tits!
Person 2: Cleavage snacking, nice.
Guy: Can I get some cleavage snackage with these Mcky Ds fries.
Girl: Is it fun?
Guy: It is for me.