A small party or gathering involving ecstasy, cocaine, Dubstep, and regular drug users; thus you are in the presence of "roles" (rolls), lines (of coke), Lights (a song by Bassnectar that should be played in any respectable Dubstep marathon), thin people (junkie thin), and plenty of action, in whatever form might suit the occassion (not necessarily sexual activity)... both the literal AND alternative definitions are found in abundance in Hollywood, the land of film sets, celebrities... and drugs.
Raver: Wow, all these fuckin' Transformers and yay and Bangarang blasting... is this a gonna be a balls-out rave?

Cokehead: No, it's just a Hollywood party, but it's gonna be live as fuck.
by Snowflake 2.0 March 20, 2012
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A term used by Hollywood Undead fans (Californian alternative rock band) - meaning to have sex, drink, get tattooed or do something illegal.
HU fan one (B) - 'Hey, it's your 21st birthday next weekend, whaddya wanna do?'
HU fan two (K) - 'Let's fly out to LA and party Hollywood Undead style!!'
by IfYouSeekAmy95 April 3, 2009
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