Top definition
To be ones sunndunn, to be dunn sunn, etc.;
A word typically used to describe a close friend, a cool aquentance, or even a piece of shit maggot mother fucker. The word can be used in serveral instances and is commonly used by those of substantial awesomeness. Use the word sparingly and with care, if used the wrong way it could lead to unwanted circumstances.
When the cool boy asked the unknowing girl to be a part of his M-azinggg expirence, and she refused he replied with a loud "SUNNDUNN!"
by Jimmy and awsome assistant March 26, 2009
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