Brass Giraffe

When you have to take a shit really bad, and you're past the point of Prairie Dogging. This is typically the point where you start standing up on the tips of your toes in order to give yourself that extra inch or so as you long legged strut towards the closest bathroom or equivalent. Common phrase to describe this is "Riding the Brass Giraffe". Those that frequently hold it in to the absolute very last minute are known as Brass Giraffe Jockeys.

"Watch out, looks like George is riding the Brass Giraffe! I swear that Giraffe jockey needs to either start taking breaks or investing in some Depends."