An obnoxious frat boy who hangs out with the boys way too much. Combination of "frat" and "fanatic".
Frat Guy 1: Dude, Johnson is a total fratnatic. He needs to
meet some ladies.
Frat Guy 2: Agreed. He's been having a little too much bro
time.
meet some ladies.
Frat Guy 2: Agreed. He's been having a little too much bro
time.
by Kamikaze Kool-Aid Man October 1, 2010
Get the fratnatic mug.