To most people, the "don't shit your pants" game is referred to as "everyday life," but if you are of the endeavoring sort that likes to simulate one of life's most uncomfortable situations, you may find this text based flash game from Kongregate to be your cup of tea.
Much like real life, this "survival horror" game is on a timer, so even though you can shat...errrr chat with other people playing the game, don't waste too much time! Also be aware that due to pixelated poop and partial nudity, this game is NSFW, unless of course you work in porn.