1 When having sex with a really ugly girl you put a brown paper bag over her head to cover her ugliness. Often in reference to girls with a butter face
see also: paper bag it

to tell someone to calm down and relax.

when you cover up beer or alchohol wiht a brown paper bag even thought its even more noticable

to use a disposable, usually paper, bag to carry something. used most commonly by grammar school teachers, where students are going on a trip and should bring their lunch in a disposable container (usually a plastic or paper bag) instead of a metal or plastic lunch boxes

Having sex with someone who has a brown paper bag over their head.

another way of saying to rough it