(N) A midget who sucks dick.
Often used as a gay joke to guys or an insult to a whore who is always sucking dick.
Also relates to the phrase "gobble the knob".
Just in case you don't know, : knob
Guy 1: *trips guy 2*
Guy 2: what a knob goblin
Girl 1: that wasn't very nice
Guy 2: shut up, you're one to, literally
Girl 1: ...
Guy 2: kthxbye