Definitions by Mastur Chief

Masturcramp 

When you're masturbating so ferociously that once you're done, your arm - from your elbow to your shoulder - will cramp up in pain or in extreme cases, from your forearm to your shoulder.

Last night i was masturbating so hard that when i was done a had a terrible Masturcramp.

Masturcramp by Mastur Chief August 6, 2011