Top Definition
Optimus Prime Pooping Time. This is when you feel a great poop coming on. You're in a great location for the poop, and you can tell that it's going to be a good, clean poop.
Michelle: When are you coming over?

Dillon: After my OPPT!

Michelle: Sounds great, see you then!
by Michelleio/Meech/SAVAGE February 22, 2011

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