one who poops while doing other tasks.
Greg is the most pooficient person I've ever met! I mean just today he closed out a contract, approved all the back-logged changes, and gave me directions to the client all while taking a poop!
You are an efficient poo-er, you are able to be done in about 2 minutes when most others poo at a leisurely pace
Wow, my pooficiency is so impressive, so much more time for Netflix!
When you are very regular and can get all your business done for the day in a relatively short window of time.
Dave has a high level of pooficiency. He can easily knock out 3 before 10 am and be done for the day. He's extremely pooficient.