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3.
Fan nickname of Olivia Benson, a detective character played by Mariska Hargitay on the popular American series, "Law & Order: SVU."

Benson never met her father because he was a common rapist who plugged Benzo's mother against her will and shot hot on the first attempt.

Usage: SVU fans who participate in the program verbally often dub over other characters' conversations with Benson such that she is constantly being dismissed or shamed because she is a "Rape Baby."
Benson: Who's the victim?
Stabler (another detective): 7 year-old girl, she watched her whole family die, then the killer locked her in a cage and left.
Benson: I'm going to try to talk to her. {Approaches the victim} Hi, sweetheart, my name is Olivia.
Victim: {Dubbed in child's voice} Listen Rape Baby, I need to talk to someone whose mother was not a cheap piece of rape bait.

Benson: Captain Kragen, I think that Elliot is wrong about this.
(Elliot) Stabler: Oh, come one, Captain, she's a RAPE BABY.
by Dr. Octagon January 02, 2008
 
1.
1. a kid who's mom was raped and she had the kid.
2. huge insult.
3.implying your father is a dick
"dude, billy is totally a rape baby, quit making fun of him"
"fuck off you rape baby"
"my dad's cool.." "whatever rape baby"
by jilldo December 27, 2003
 
2.
The moniker given Pete Wentz of Fall Out Boy fame by several members of the internet community originating at the comment page of the popular blog, The Hater, featured on The Onion AV Club. The reasons for that name are obvious yet have already become unclear.
What is the name of that douche who plays bass for Fall Out Boy?

Rape Baby, duh. He's such a Wentz. The whole world knows that.
by c2feeln April 26, 2007