Top Definition
The kind of fart that makes everyone need to vacate the room for hours. The smell is awful, and is not possible to get used to. Rarely is a fart that bad, but when it is, yardena is the only word to describe it.
Did you hear that joey made a yardena in biology class yesterday? We tried to ignore it, but we couldn't even wait a full minute before the teachers screamed EVACUATE!
by Fatchance March 26, 2009

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