Untimely Bladder

The untimely, and extremely irritating feeling of having to pee, as soon as you know that you can't

Example of this would be; right when you find your spot in hide and go seek, whenever you get stuck in line, when your in the car-miles away from a rest stop, etc.

"As soon as i found my hiding spot, I totally pulled an untimely bladder, shit!"

"This line better move faster, I gotta take a raging piss!"

"When's the next rest-stop?" - "25 miles" - ".....shit i gotta pee."