Top Definition
1. The complete and polar opposite of wonderful. Everything that is horrible, wrong, decietful and unhealthy in the entire world.

Something that is munderful has absolutely no value. Munderful can be used to describe the symptoms and odors of a sexually transmitted disease hosted by any boy/girl under the age of 18.
After I hooked up with that girl my fingers smelled Munderful, So I never called her back.
by Joshua Too hot hamburger September 25, 2008

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