The "griznatch" is the area just left and right of a males penis on the upper thigh area. Prone to heavy sweating and very painful muscle aches which will make the man walk awkwardly for days.
Jock 1: "Hey bro, how is your ACL feeling?"
Jock 2: "It's feeling fine, but now my griznatch is killing me."
Jock 2: "It's feeling fine, but now my griznatch is killing me."
by B Teach May 17, 2013