The act of farting in someone's drink. Usually wait for a friend to get up and go to the bathroom, leaving their drink at the bar for an assortment of pranks. It's pretty simple, just wait for them to leave and fart in their drink. It's called pulling an Uncle Bobby, because it's such an asshole thing to do.

When you eat dirt for the first time and leave your family to build a shack in the woods

An Indian (of the country of India-n decent) who is an Uncle Tom. An ethnic Indian person who distances himself from his people and culture to appear more white.