Toss the sauce - Variation on snowballing when your partner spits cum in your face instead of making out with you.

Another phrase to be a verb of ejaculation

Rubbing out a baby batter batch

(v.t.) to ejaculate, generally upon a surface or person. The phrase's sole grace is its rhyming nature.

a phrase used by teenage potheads who have no lives what so ever, and find it rather entertaining to make things like this up :

used when describing something of displeasure or just when you feel like saying it.
also makes situations funnier.

When during a threesome, he or she takes a mouthful of cum, and then forces it into the third parties asshole via their mouth.

When you cum in your partners asshole, and then eat out their ass.