When you finger a stanky ass ho with a dank ass puss- and you wipe your nose, hence giving yourself a herpie mustache
"Wang dog, who were you hooking up with last night? "
"Bro, totally hooked up with Chels last night"
"Damn, you got the herpie mustache"
"Yo dude, what the fuhh is under your nose?"
"I don't know man? Why? What's there?"
"Were you chilling with Lauren?"
"Ya dude! Fingered her last night :):)"
"Herp lip strikes again!"