1 definition by does anybody in the world care

Used in the phrase "to pull a mustaine", to yell "FUCK YEAH!" in the most random and usually inappropriate of times.

Named for Dave Mustaine, vocalist/guitarist for Megadeth; derived from the song "The Mechanix", in which Mustaine for no reason yells "FUCK YEAH!" near the end.
"How could she tell Dave was watching the game and not listening to his girlfriend?"
"Well, she was talking about her sick cousin, but his team scored a goal and he just pulled a mustaine."
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