Roadie Dave - is that one friend that has an alternate personality when her/she gets drunk. Their aggression is usually sexual in nature. They tend to yell and scream obscenities.
Roadie Dave: I'm gonna get you (while seductively running his or her fingers over their lips and/or nipples)
Friend: ROADIE DAVE! Ahh Shiiet guys Roadie Dave has arrived. Someone gettin' humped!
Roadie Dave: OH YEAH! ( doesn't blink and stares at you in the eyes )