Texting a bunch of girls or pledges at the same time, trying to get them all to do the same thing.
I just sent a FratBlast to an entire sorority about our party right now - it's about to get real!
by FratBoss February 03, 2013
1 more definition
Vomiting, often projectile, after or during a long night of fratting.
I frat blasted, rallied, and still hooked up with that sexy sorostitute.
by gpdubya September 17, 2010