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1.
The sensation the one derives from taking a hit of cannibis thats so deep and moving that it leaves your testicles tingling. Often accompanied with a deep, hoarse cough.
Jeff hit just that spliff so hard it was a testicular tickler.
by Pocahantous March 02, 2012
 
2.
When a woman is using a tickling motion with her fingers on a mans balls.
I was with this freak last night, she even used the Testicular Tickler on my balls.
by Noicore June 24, 2010