Wazoo!

Typical conversation at work.

Greg:"May I borrow your Sharpie(tm)?"
Doug:"Certainly."
Dick:"Don't we have any in the back cabinet?"
Greg:"I've never seen any back there. The only repository of Sharpies I've seen is at Doug Shires' Pen & Ink Supply."
Dick:"DynCorp used to have them up the wazoo."
Greg:"Yeah, well, no one ever wanted to use them because they had been up somebody's wazoo."

Wahoo!