Party Boy is when two or more males run up to someone of either sex and proceed to dry hump the target while screaming "Party Boy!" and throwing their arms up in the air.
1)Jeff C aka PHS PARTY BOY
2)To strip your clothes off leaving nothing but a SILVER Party-Boy Thong and a bow tie...and then to dance and grind homosexually(most of the time)with a random person....
Party boy keckes ass. He pulled me up on stage at the Brisbane show of don't try this at home and he said I was a cook ckick. He thinks I'm hot can you believe it.