I dunno... I kinda like the noun form, as a verb it reminds me too much of smirk...

maybe it can be both, like the word 'snarf.'

snarf -
n. the nasty stuff around the edges of a dog's mouth
EX. "dog snarf"
v the act of wiping/blowing/slinging the aforementioned yucky stuff.
EX. "EWWWWWW.... Don't snarf on me, Sara!"