crumb slumming

The act of digging for, scooping out open palm, or smoothing a bag of chips and pouring it into your mouth in the attempt to devour the chip crumbs/flavor dust while friends/family/coworkers/strangers look on with disapproving eyes at the sight of something they would totally do if no one was watching.

Yo Gary, look at Kate crumb slumming it with that bag of doritos. Apparently the only thing on a diet is her dignity.