Dude, I got a wicked knob slob the other night. The girl was like a vacuum.
(verb) The act of performing highly skilled fellatio
in such a manner as to provide great joy to the recipient.
His girlfriend knew how to knob-slob like there was no tomorrow.
Girl who doesn't swallow or lick cum off a penis when she's done leaving it all messy.
That girl is such a knob slob, she refuses to swallow.
when ur gettin ur dick sucked and when shes done u still got knob slob on your dizznik
the bitch sucks good dick but she keeps leavin knobslob
person who gives messy head (knob=head of penis; slob=messy, untidy).
See also knob slobber
Erotic magazine advertisement, ca. 2004: "You can go from knob slob to blow job champ (by buying this book) . . . "