Spinch

Spinch - to pinch the sphincter to avoid turtle heading.

Or sometimes an unfortunate misspelling of Spinach which happens to be a delicious highly nutritious green leafy vegetable. That happens to be quite beneficial to your colon.
Spinch/Spinach --------> BIG DIFFERENCE!

You had better use the loo now, or you'll be in a real spinch later.

We got ta get out of here man! I'm totally spinching.

I'm brooding a spinch.