look up any word, like blumpkin:
 
1.
Term used to describe a girl who will attend class without showering, doing her hair, or wearing makeup. Has the effect of withering boners for 100 yards in every direction.

Etymology - combination of the words "broke" and "uncle," because only someone's unemployed male relative can attain such a level of crippling slovenliness.
"There are so many brunkle bitches in my morning art history class it's not even worth going."
by Horbs May 01, 2006
 
2.
Someone who appears unwashed and is generally offensive to all 5 senses.
"That girl is brunkle as hell"
by Greg & Lü April 17, 2006