Top Definition
Used as a shortened version of the phrase, "You've failed me for the last time." Used originally by the legend that is Darth Vader. Now used to express a trendy distaste in another person's failures.
Subject A: "Hey, what time is it?"

Subject B: "I don't know, I don't have my watch with me."

Subject A: "Yufmelt."
by Echelon4tw February 03, 2010
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