Top Definition
A highly contagious Emotional STD contracted by caring too much about a parasitic person who cares very little about you and far too much about themselves. Mental Crabs can give a person the feeling that their heart and brain have been drained yet they have the desire to allow the parasitic person to continue feeding off of them. The only way to treat Mental Crabs is to sever all contact with the parasitic person and cleanse the heart and mind with the company of positive, caring, loving people.
I broke up with him because he was giving me a bad case of Mental Crabs.
by MakeajokeItmakesitbetter January 23, 2013

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