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1.
A really fat chick. Can be seen attempting to destroy humanity with her passes at skinny white boys. Nearly indestructible.
"Holy shit dom, it's a goddamn brumak!" - common phrase to scream when unexpectedly seeing such a creature

"She's such a brumak... how does she buy shirts?"
by CourageWolf January 22, 2009
 
2.
When four to five kids stand around in a circle and spontaneously begin to get into sexual positions and begin to hump each other in public after they have witnessed and overweight female walk by.
oh god...BRUMAK (violent humping)
by clamdigger123 February 22, 2009