The lovley smelly "yellow" discharge that is at the end of a males penis due to the lack of attention to the beast during showering or bathing hours, orpossibly gained from baning a bird who has a vag the size of a taliban cave and has had a few other man members up there!
billy "doctor i appear to have yellow shit on my willy???"
doctor "billy my boy thats what we profesionals call knob chedder, have you been washing you penis or possibly been slipping it in the dirtyest of the dirty women?"
billy "..........possibily both....damn!"
the lovely present left at the end of ur knob after a wank and ur too lazy 2 clean up..!!
steve: why is your knob covered in knob cheese ( or knob chedder) ?
adam: oh yes i often wank and do not clean up in case i have too buy new tissues