cob knobber

The act of a woman not being able to fit a large penis in her mouth at which point she only able to lick of munch on the side of the penis back and forth in a typewriter movement as if you are nibbling on a ear of corn. This is a true "cob knobber".

Words also used: cob knobbin', cob knob, cob knobbler

Woman to man: "Oh my God! That's so big I can't fit it in my mouth! I will have to cob knob it."

Man to woman: " I hope your a good cob knobber because I an very well endowed,"