A very unattractive, creepy guy at bar, who lurks, watches, and looks for women to hit on. He is also the unattractive, creepy guy on the dance floor who will attempt to dance with you multiple times and never get the hint that you don't want to.
"Oh my god, that creepy guy keeps staring at us. What a skeevester!"
"That guy would not stop trying to dance with me. He is a total skeevester!"
(verb) to gross out; to digust; to make your skin crawl, sometimes with undertones of sexual deviance/perversion
It really skeeved me out when he ate the gummy bear off the floor in the movie theater.
or
Twenty-year-old guys who dategirls too young to drive really skeeve me out.
"Keith just stood in the corner all night at Maggie's party and didn't talk to anyone. When I looked over at him he winked and blew me a kiss. What a Skeeve Bannon!"