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1. when something goes wrong
2. when u say or someone else say something bad.
3. the only you can say after someone tells u something bad that happened to them
example: car broke down. bust-nugget instead of useing "fuck"

example: your talking to a bunch of guy and u say " that girl is such a slut" and she right behind you then u say " bust-nuggets"
by waffle dude August 17, 2010
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