the act of sex between older persons and those specifically those who have suffered hip replacements or other movement difficulties. Tortoising can involve the use of a zimmer frame to create the shell in particularly active relationships.
When you have to poop really bad and can't hold it,that is when you tortoise. You let the poo come out of your anusjust a little bit so i looks like a tortoise coming out of it's Shell.
The moment when you can't hold in youre poo and the tip of the shit comes out of your anus. Most of the time you are able to pull it back in when you have strong sphincter.
Oh damn, i am tortoising . I really need to find a lavatory or my briefs will get very dirty