Top Definition
When you're taking a shit and jerking off at the same time, right before you're about to ejaculate you stand up and cum on your turd. At this exact moment either your mom, girlfriend, sister, or any female oriented human must walk in on you. Only then will it be a true plunderbluff
"I'm grounded for two weeks.. my mom totally caught me in the middle of a plunderbluff"
by PoseidenPlunderBlouse February 16, 2013

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