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Someone who goes for a number two at exactly the same time every day. They are so punctual that EVERYONE knows where they've gone!
Example 1
Person 1: Abel is such a punctunal-pooper!
Person 2: i know blud, i swear mans could set their watch with him.

Example 2
Person 1: Where's Abel gone.
Person 2: You know where blud!...it's 14:30!
Person 1: That dude is such a punctual-pooper.
by mrlambo February 02, 2012