Guitar Douchbag is the guy who goes to a party and pulls ALL the tail due to his guitar playing “skills.” So say some guy is there and being all charming and telling jokes and is the life of the party, then guitar douchebag comes in and sits down in the corner with his guitar and starts strumming a few notes, then goes into full on song with lyrics. You don’t even really need to know how to play well. You really only need to mix in like 3 chords, you can even make up the song on the spot. The panties will drop faster than the eye can see.
I was the life of the party, everyone was loving my jokes, then guitar douchebag came in and stole all the chicks right from under us.