look up any word, like pretty face challenge:
 
1.
To pilfer, steal, take without permission.

Appears in Mark Twain's "Huckleberry Finn."
So I'll mosey along now, and smouch a couple of case-knives.
by cathinator, the. November 21, 2004
 
2.
dumbass,douche bag,etc.
dooood, my mom is such a smouch. She's REDIC!

or

wtf br0, how much a fucking smouch can you be?!
by malice millionaire June 10, 2007
 
3.
A generalised term for a sloppy vagina
You could fit a dozen cocks in that pirate whore's smouch
by Drew Christx November 11, 2004