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sperm jack 

To commit forcible theft of sperm.
After Jane, sperm thief extraordinaire, handcuffed John to the bed she proceeded to jerk him off in order to extract sperm. When he climaxed she put the sperm in a small container, got dressed, and left. John was sperm jacked!
sperm jack by J-Fad December 15, 2008

sperm-jack 

The process of taking someone's sperm and using without their permission
Kathy is trying to sperm-jack Paul so she can have a baby on her own.
sperm-jack by Lorcán000 January 14, 2009

Sperm Jacker 

A female whom steals sperm from a genetically superior and unsuspecting male victim in order to produce an offspring to improve ones family genes.
That Sabrina was one heck of a sperm jacker
Sperm Jacker by DaTruth2009 August 30, 2009

jack!sper 

A name used to refer to the combination of Jasper Hale (from the Twilight series) and Jackson Rathbone, who plays Jasper in the movie Twilight. This term is specific to the movie character, as opposed to just Jasper, or just Jackson Rathbone. Often the word is misspelled due to omission of the exclamation point.
Did you see paparazzi Jack!sper in the new MTV Twilight interviews?
jack!sper by PlanxtyLewis April 14, 2008

Spermjacking 

Term used to define the involuntary collection of a man's sperm, generally comitted by females who desire to have a child with a male with no such desire.
"Kitty was totally caught spermjacking George Senior, that bitch. She was worried that his new hair growth medication would render him sterile."
Spermjacking by Divisionbear June 23, 2009

spermback 

As you’re about to cum you pull out and spermback your ejaculate all over the person’s backside
spermback by SMWJLA Partnerships October 20, 2007