Top definition
Pronounced: Ethel Methyl Die For Sure 'n All

A chemical or gas that the effect or name of it is unsure but you know that it is bad.
Bob: Hey Steve, what is it in that bottle? It sure looks dangerous.

Steve: I don't know, probably ethelmethyldieforsurenall.
by Alistair MacIlherron September 28, 2009
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