Penisweasel
A person who will interrupt a friends attemp to seduce a person of the opposite sex, just to introduce themselves and try to seduce the same person.
Taylor: Would you like to get out of here and go back to my place?
Object of Seduction: Well...
Josh: Excuse me, I'm Josh. Can I buy you a shot?
Taylor: Dammit Josh, you penisweasel
Object of Seduction: Well...
Josh: Excuse me, I'm Josh. Can I buy you a shot?
Taylor: Dammit Josh, you penisweasel