the flaky skin on a gentleman's scrotal sack after he has scratched himself too hard.
I scratched myself so hard I developed balldruff
di drdruff 10 maggio 2009
1 more definition
The hardend leftover of male ejaculation, after a day or so, it becomes a flakey, dandruff like material.
dude, i think your friend had sex in here yesterday, look at the balldruff on the blanket, eww.
di Fish Snacker 16 marzo 2007