Porta-trotty

The funny run-walk you do when you've left it too long before going to the toilet at an outdoor event, such as s music festival, where The only toilets are porta-loos/porta-pottys.

They could all see me on the brow of the hill making a hop, skip, dash for the loo with my knees fused together so as to not release the krappen. It was my most painful porta-trotty experience.