When one's arm is too sore or in extreme pain due to excessive masturbation. Usually interferes with everyday activities and can take weeks to recover from.
John: Dude I took like three Tylenol pills this morning
Brandon: What do you have the cold?
John: Nah, I got a bad case of the Jacker's Arm.
Brandon: What do you have the cold?
John: Nah, I got a bad case of the Jacker's Arm.
by Pandad March 24, 2009
Get the Jacker's Armmug.