The solid state of cum; occurs some time after ejaculation when the cum becomes dry and flakey if left on some surface or in an orifice.
Later that day, after getting fucked in the ass, Jeanine saw some cum dust on her leg.
1.The product of dry love making,
3.Old man semen
4.the product of a african american who doesnt lather his skin with lotion
"Dude you got a serious case of cum dust