An outdoor toilet is a term used to describe temporary restrooms set up as extra restrooms at construction sites, special events, parks, etc. Any sort of toilet that can be moved around is referred to as a portable or mobile toilet (colloquial terms: thunderbox, portaloo, porta john, or porta-potty). Some toilets may be moved by one person, while others require mechanical equipment, such as a truck and crane.

The waste is flushed away by a portable toilet in a manner similar to a regular toilet. However, the waste is moved into a holding tank underneath the seat rather than the sewer. Chemicals are utilised inside the tank to lessen odours, break down waste, and kill germs because the trash is kept there until it is emptied.