Poo-ficient Share definition Flag An adjective describing one who poos efficiently. ie one-wiper "Wow, he was only in there for a minute. He's very poo-ficient!" Poo-ficient by Mr. Poo-ficient May 18, 2014 0 0 Get merch Get the Poo-ficient mug. Buy Now — $32.95 See more merch