A woman (or man, whatever submerges your submarine) who gives awful blow jobs. The name originates from Cobzeus, the Norwegian goddess or corn shucking, who once treated Hermes' penis as a cob of corn.
Yeah, Julia Roberts is really hot, but i heard she was a cob knobbler. And anyways, she's a homewrecker, and she's not hot.
by Hanzeus September 29, 2003
one who knobbles the cob.
anyone who drives a Prius is a cobknobbler
by Atom the Impaler July 29, 2009