frat dog

Having sexual intercourse without a condom.

Joey tried to frat dog Kayla, but she told him to bag it.

by Dan Teeman March 1, 2008

frat dog

A person who enbodies all that is being fratty. Sometimes used to mock those in fraternities. Mainly used in a joking manner to describe living a life of partying.

I consider myself the biggest frat dog on campus unlike those non greek herbs.

by JaKy May 5, 2007