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1.
german for marijuana
i smoked so much borst last night
by LilJOnwhattt August 01, 2005
 
2.
A contraction of "Best" and "Worst". Used to qualify something that is both the best and the worst at the same time.
This is the borst

Your the borst

Borst dance move evar!
by Mathieu Sylvain June 21, 2006