n. see brownbagger. A female who is so unattractive that you require not just one brown bag on her head while having sex, but one on your own in case hers falls off.
Fred: Hey Billy, here's a picture of my newwife Jen, isn't she great?
When a women is very unattractive. So to solve this you put a brown bag over her head. Two possibly, one for you and one for her if she is that bad. Then you proceed in sexual intercourse.
Dude did you see that nasty chick? You need to take her out for a brownbag lunch.