Brownthumbing

The act of wasting time, having nothing to do. Another way of saying," Standing around with your thumb in your ass."

We were just sitting here brownthumbing it, when you came along an gave us something to do.

by BrokeAss garage January 27, 2017

chief brownthumb

A Chief Brownthumb is a person who has 'thumbed' another human's rectum and left with a small secretion or hershey's kiss on the thumb or thumbnail.

Man, I just Chief Brownthumbed that girl.

by 911 and Cali August 27, 2009