When a kid named Eric's arm is fucking curled up and he try's to rap but sucks ass.
Eric fisted Mr. Donovan with his crab arm while being called a retard by a gay kid named Matt.
by Dick wand June 11, 2014
Get the Crab arm mug.
Crab Arm is a condition that you get from cracking someone else crab. He cause excruciating pain in the forearm and can leave the sufferer from ever cracking crab again.
Scott cracked so much crab the other night he woke up with crab arm.
by Cjn2008 August 25, 2008
Get the Crab Arm mug.
Crab arm syndrome is when one arm is excessively more muscular than the other due to chronic masturbating
Colin has crab arm syndrome from beating his meat too much
by Assrhamar March 17, 2019
Get the Crab Arm Syndrome mug.
When you’re pushing heavy at the gym and suddenly one arm that you don’t fap with as much starts letting you down so you continue the set with your strong boy hand.
Kershit the dickless: sheit mayne that dude is lifting 4 plates with his one hand.

Cetnar de Nark: yeh bro but his left hand is giving out.
Kershit the dickless: fuck you’re right! Fucking looks like those crabs with one big ass claw and their other looks like some retarted prop from the Halloween store.
Cetnar de Nark: yup definitely a crab arm/hand
by Smoke and Fork Banger’s Club September 13, 2018
Get the Crab Arm/Hand mug.