Custom UD mugs
with your fave def Now available
1. frat rat
A girl that spends exorbiant amounts of time at a frat house, usually with the intent to slut it up with one or more of the fraternity brothers.

A girl that fucks a different frat guy every week.
1. Michelle S. at Illinois State University

2. Frat guy 1: "Man that chick is over here doing a different brother every week!"
Frat guy 2: "Yeah dude. She's a frat rat."
by Dave Dec 13, 2004 share this
2. frat rat
A licentious girl who tends to spend copious amounts of time at a fraternity looking for ”frat guys” to pound her in ways that are illegal in most conservative states.
1. Kristen M. at Purdue University

2. Frat Meathead 1: Yo Brah, that Sarah has been shaking around here brah.
Frat Meathead 2: Yeah man, that girls a frat rat … brah.
3. frat rat
1. A greek system leech. Someone male (could be female) who is not an actual member of a particular Frat, but comes to every Fratty Function anyways. Most often these people wouldn't be accepted by the frat anyways and no one really wants them around.
FrattyFrat #1: So you think John's showing up tonight?
FrattyFrat #2: Dude, when doesn't that Frat Rat show up?
FrattyFrat #1: Shit... oh well, lets go rape some high school girls.
by Rob Mar 28, 2005 share this
4. frat rat
a girl that whores herself at a frat any day of the week...for free.
a frat rat is a slut, paris hilton, briana hilton who will suck off pretty much anyone
5. frat rat
Any member of a college social fraternity. Usually derogatory.
#1: I heard John joined SigApes.
#2: Yeah, he's become a frat rat.
love it
hate it