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1.
To drench someone in sperm
Rob: Check out that ass! I would totally sperminate her any day of the week!
Matt: HAHAHAHAHA, your chances with her are slim to none.
by Mister D October 20, 2004
17 6
 
2.
To squirt cum at a person or object.
Opps, I just sperminated my computer screen, darn you Linda Tripp, you sexy transvestite.
15 6