When you have to poop really bad and you can barely hold it in. So bad the poop is touching your underwear or is close to it.

You're clenching hard, but the little brown turlte has got his head out of the shell, and is chomping on your underpants.

when the brown dog is peeking his nose through the fence, when the turtle's head is out, when you need to drop the kids off at the pool.

The need to defecate.

when one needs to use the lavatry so bad that it is unbearable and the excrement begins to touch your underwear.
Touching cloth is the stage before the term running (or rolling depending on the shape)down ur leg and after the stage of losing control of ur bowels. Touching cloth more often than not leads to stains so, heavens, please do be aware

When one has left it far too long before having a shit and the brown toad slips out early

When one binds ones "cheese" in fabric,thus leaving the woven imprint upon the "ripe old cheshire"!