1. Bringing your lunch to work or school in a brown "paper" bag. 2. A dirty t-bag, normally performed after anal sex or a long days work. 3. Placing a brown paper bag over your sexual partners face, due to ugliness or to better fantasize.
Dude: Im brown baggin today! Damn snack machine always eats my dollars
Woman:Oh god, what are you doing? You never go ass to mouth!
Man: Im brown baggin your pie hole, leave me alone lunchbox
Woman:Why do you always brown bag me before we have sex?
Dude: I like thinkin about your sister..