Adj. General term used to describe the over all poor quality of a person, place or thing. A derrivative of weak sauce, it's a more underground means of referring to someone who is, in fact, weak sauce.

Robert: Hey, Ira, how's you do on Mr. Fabregas' test?

Ira: Bro, that test was whack stallion.
by yumul November 7, 2006
Get the Whack Stallion mug.