An elaboration on calling someone a "dick" or a "knob".
Also used to suggest they suck a lot of cock.
She's a real knobber, and not in the way you're thinking.
~ Usually only used when special, unexpected, or when you gave or received to/from this particular partner for the first time. This differs from knobs in that knobs are a fairly regular thing. Like when you get knobs from your girlfriend every morning before work. Getting knobbers is special.
2. Oh, that girl gave me mad knobbers.