J Stain
Any white goop that dries and sticks to your clothes. It could be jizz, or it could be something even worse, like glue or paint.
That stain looked like it came from a paint can that exploded on his shirt.
She got glue on her pants and now it’s a permanent J Stain.
He got paint on his shirt and now it looks like he was in a fight with a wall.