look up any word, like oprah dollars:
 
1.
More commonly referred to as a smirk, a douche grin is a smile that expresses scorn, smugness, etc. Often performed by smiling on one side only. The douche grin was named so because douchebags are inclined to abuse smirking.
That guy's douche grin makes me want to punch him in the face.
by Broski O'Bronald January 21, 2010