When a chubby person wears a shirt that is too tight for them, and the material stretches tightly over the large recess in their stomach which leads to their bellybutton. The tightly pulled material yields a 'trampoline' effect over that area.

Tight fabric over the belly button crevice of muffin tops. bounce on that shit, yo.

v. collectively or individually finding someone/something to blame for a problem, as opposed to brainstorming which connotes finding solutions to a problem

n. the act of finding someone/something to blame for a problem

(from a TV ad for HD television)