someone who, generally in an office-like setting, will want to stop you and talk about usually seemingly nothing on your bee-line to or right before entering the potty for a BM.
Yesterday I had the bubble guts and had one goal on my mind- getting to the fucking toilet swiftly. John Doe was being a fudge blocker
and wanted to talk to me about sports
on my way there and wanted me to come over to his computer and watch a video.