look up any word, like donkey punch:
 
1.
your smile when you know your in trouble
Damnit, don't give me that shit faced grin!
by Elwood Blues Brother December 18, 2009
 
2.
When someone is shit face drunk and has a mischievous grin

See also: shit faced
Shawn has that shit faced grin again
by phantaxtic August 11, 2014