Brawlnighter 

The act of staying up all night while playing Super Smash. Bros. Brawl.

Man 1: What did you do Saturday Night?
Man 2: I pulled a Brawlnighter.
Man 1: LAWL NERD

Brawlnighter by From: ELEKIDx February 19, 2008

Brawlnighter 

An all night party playing Super Smash Bros. Brawl, for the Nintendo Wii.

Man, that Brawlnighter was intense!

Brawlnighter by Kitoro February 19, 2008

Brawl-nighter 

Spending an entire night playing Super Smash Brothers Brawl with your friends, in a spirit similar to an all-nighter, usually accompanied by massive amounts of work or study.

Man I didn't get a wink of sleep last night; Me and my buddies held a Brawl-nighter.

Brawl-nighter by Lutzburg February 19, 2008