Toilet-roulette 

A game that you many times are forced to play when visiting certain institutions and public places.

Takes place whenever you're in the need of toilet facilities and are
a) entering a booth or
b) raising a toilet seat cover.

You loose in toilet-roulette if the toilet is blocked and full of yuk.

The chances for loosing in toilet-roulette are usually lower in the morning, and increases for every opening hour. In extreme cases the odds for loosing are above 9/10.

A: Hey girl. You'll keep the table for us, while I'm getting some lunch?
B: Agh. Fuck it. You can have my lunch bag. I was suppose to take a quick wee before I met you, but lost toilet-roulette 7 times, and now I'm too disgraced to eat my lunch.

Toilet-roulette by CBS-student for better toilets December 7, 2011

Toilet Roulette 

Any horrible instance where you have to choose between sitting on the toilet to urinate and/or defecate or vomiting.

While having the flu, Nancy was often victim of toilet roulette.

Toilet Roulette by masonthekiller May 7, 2011

toilet stall roulette 

When you walk into a public restroom and someone else is walking out and you have to try and guess which stall they used so you can choose another.

-What took you so long?

-I walked in the bathroom as a fat guy walked out so I had to play toilet stall roulette. I lost. The seat was warm.

toilet stall roulette by Psychic Canadian September 16, 2013

Toilet Paper Roulette 

This happens when everyone in your household is trying to be the one not to change the toilet paper roll. Everyone measures the amount they take according to what's left on the roll.

Aww shit, Arnold left only 1 square left on the toilet paper roll. Looks like I lost this round of Toilet Paper Roulette.

Toilet Paper Roulette by Tustin May 11, 2011