Top Definition
Power Up, Power Down, or Get the Fuck Out.

A challenge issued from one party to another. Similar to a "Double Dog Dare", the receiving party must, through force of will, "Power" Up or Down. If the receiving party does not PU or PD, then he must GTFO.
Hey carpet muncher, you have 17 Keystones left to drink, PUPDOGTFO!
by LaMesa May 06, 2009

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