Bio-break

We stopped once for a bio-break at a road side gas station. Most of us (including a few women) used the bushes because it took too long to get in the bathrooms.

Source: wiktionary

"You are either going to stop for a gas break, meal break or a bio break. At these facilities you can do all three."

Source: wiktionary

Bin-Laden says his hatred of flush toilets stems from an incident in his youth when he was visiting London with his family and faced with nature's urge to take a bio-break was shocked to see his first flush toilet.

Source: wiktionary

There is barely time for a bio break in between events.

Source: wiktionary