Lifting up the enormous flap of fat in order to find the genetalia of a person with whom one is about to have sex, esp. with large females.
Jonathan: I just found a cheeto in your bellybutton!
Mr. T's Mom: DONT EAT IT. I want it. You stuck it in yet??
Jonathan: I gotta open the garage first. Lean back. *sticks it in*
Mr. T's Mom: Is it in yet?