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A slightly more sophisticated way of referring to the scrotum (ball sack). Often used in a threat of being hit in the balls.
Ted: Man you really suck at Wii.

Ralphie: You better shut up, or I'll give you a good whap to the Testes Satchel!

Bob: Why are you clutching your pants like that?

Bill: My Testes Satchel is still sore from being sacked yesterday.
by Larry Finster December 27, 2009
A testes satchel is another way of sayin ballbag. they can be hairy, sweaty, saggy, tight etc
Can u please remove Dan's Testes Satchel from your mouth Joe you dirty teabagging homo.
by Issac Hunt August 24, 2006