Something that Joey in "Yu-Gi-Oh: the abridged series" says multiple times in Episode 28. Basically, it is acting angry with a Brooklyn accent. Yugi tells him that this phrase willnever catch on.
Asshole: Man, you ain't seen NUTHIN 'till you've seen my brooklyn rage!!!
Guy: Dude...stfu.
A level of rage only achievable when a person of rage reaches extreme levels of annoyance. It is not limited to, but usualy found around groups of extreme gamers; and soundtracked by yu-gi-oh abridge's "Brooklyn Rage" song.
Gamer 1: Hey guys, I'm gonna try and fight three level 9 CPU Pikachus on Super Smash Bros. Brawl.
Precedes or follows either a gratuitously disrespectful or honest remark, originated in New York City. Used in similar fashion to "no offense" or "to be honest," interchangeably.
Ya mans is wild buns, respectfully. Respectfully he's washed.
After school, The Modells on Jamaica Ave was active. Respectfully.