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Martha Wheezer, is Carl's overweight, kind, and ugly mother with a gruff voice. In Grumpy Young Men we learn that she is really 42 years old.

Personality

Despite her odd moments and deep, off-putting voice, Martha is actually a very kind and friendly lady. She loves her husband and son a lot and is very pleasant towards a lot of people, particularly the Neutrons.

Looks like one of Jimmy Neutron's incomplete inventions A.K.A a Stub.
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