This is a variant of :P
, adding the wink to denote sly humor in sticking the tongue out. The combination produces the effect of not taking one's self seriously in a sort of facetious playfulness. This may either be used to qualify a statement or ascribe the character of a comment.
(qualifying a statement):
viscera: my friends left the room for a couple parts
Shadow: haha, and you didnt?
viscera: I'm not as queezy as them ;p
Shadow: I need to get a job =(
viscera: just go smelt iron with Rob ;p
(ascribing meaning): That's just like...your opinion...man ;p