A vaginal barf, i.e. vomiting towards or into the vagina.
I was so drunk, I was going down on this chick and totally varfed her!
When yo friend is funny as hell and you laugh so hard when you go to burp you vomit.
"Bro what is he doing" "Bro I'm so hella funny that I made him varf"
A Varf is a vampiric Smurf, that lives in a vacuum, that evolved from a fur ball coughed up by a Persian cat.
Oh My Friggin god, Is that a Varf on your rug!