When your mother or father has a child with a sibling i. e brother or sister
If you come from Norfolk in England you'd probably went to school with your Brunkle...
by JeffBull February 13, 2018
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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 2, 2006
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Someone who appears unwashed and is generally offensive to all 5 senses.
by Greg & Lü April 18, 2006
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someone who is not very smart.
they are known as the “dumb one“ in the friend group.
Denes is being a brunkle brik! He thought the world was flat.
by Yelena Rose July 4, 2023
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