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1.
The murder of a testicle.
Moniquia was so angry with her baby daddy, she committed testicide.
by Mararrrr July 28, 2010
 
2.
To accidently shoot oneself in the scrotum - usually while stuffing a handgun in your waistband without a holster.
Did you hear about the bank robber that committed testicide right in front of everybody? He went to make his getaway and stuffed his gun in his pants - next thing everybody knew there was a loud pop and the dude was rolling on the floor writhing in agony. Ah sweet justice.
by Gettin N Eiffel January 22, 2008
 
3.
To commit suicide by shooting oneself in the balls.
"I gotta commit suicide,hmm, testicide anyone?"
by GregTheShowerDemon1 November 20, 2011