the flaky skin on a gentleman's scrotal sack after he has scratched himself too hard.
I scratched myself so hard I developed balldruff
ayon kay drdruff ika-10 ng Mayo, 2009
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.
ayon kay Fish Snacker ika-16 ng Marso, 2007