To ejaculate from masterbation
“Why is this towel all crusty?”
“Sorry man, my girlfriend is out of town so I’ve just been slinging toothpaste all week”
Toothpasting is a type of masturbation where a man sucks another man’s penis until ejaculation, where he then used it as toothpaste.
Kellan refused to give a Toothpasting.
The method of draining the male urethra, reminiscent of squeezing an almost empty tube of toothpaste.
Hey dude, you've got hella piss-print. Have you been toothpasting properly?