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To royally fuck something up, usually making a huge mess in the process. The act of "Nelgas"ing is usually followed by the word "what" or "probably".
Boy, you really Nelgased that dinner.
Reponse: "what", "probably"
by SlickShitty November 14, 2006
2 1

Words related to Nelgas:

dumbass fuck idiot mess moron retard stupid