someone who parties so hard that they have to get stiches (usually on their knee); one who is always up to "take a shot", "whip their hair" or "dougie" no matter it be in nyc, long island, or miami.
Engeline was such a rager that she accidently hit some glass and had to get some stiches--she was still raging at the ER.
Tiya was such a rager that she tripped in the driveway and fell, only to get up and dougie.
Notorious in college but high school can have major ones as well. Its not just a party but a massive party that usually consists of crazy shit happening. Keggers are a must. The party is so full that you can barely move around.
Yo man there is a rager pool party happening tonight at TA's