a manover is a sleepover involving only men (and in some cases boys) in which only videogames are played late at night, if not all night; can be similar to an all-nighter.
John: hey man, you going to Bill's manover?
Joe: yeah man, im going to own you guys all night at Halo!
Joe: yeah man, im going to own you guys all night at Halo!
by Blaketpt22 October 14, 2007