Fraternity guy who tries to be hip but can't because... well, because he's just a lame fraternity guy. A term more from the 1960s and early 1970s. Probably a combination of beatnik or peacenik and frat guy.
At a Dylan concert in 1969.
Me: Aw shit, man, look over there. A bunch of fratniks.
Drew: What?
Me: Over there -- fratniks.
Drew: What?
Me: (pointing but not saying anything)
Drew: Aw shit, man.
the bro'est thing to do on a saturday afternoon when there is nothing to do. Conditions: 1)must be done in a frat house 2) three or more "bros" must be involved 3) bros may NOT share furniture during fratnaps*
*rule 3 may be ignored if said furniture is large enough for two bros to lounge and not touch bodies.