Cum, usually in trace amounts, that has dried into flakes resembling those of dandruff, except perhaps a little yellower and definitely smellier.
I had a hard time wiping my jizz out of my pubes and chest hair, and 15 minutes later I noticed I was covered in cum flakes.
After ejaculation, cum that sits on your skin, dries up and eventually flakes off.
An hour after nailing my wife, I took a piss and scratched a huge cumflake off my stomach!
Cum that flies through the air like snow flakes.
GIRL: So many cum flakes, how should I Catch Em' ALl like in pOKEMON?
GUY: Try to let me cum in your mouth.