What is "flying toilet"

n. (context euphemistic English) The use of a plastic bag for defecation which is subsequently thrown away.

A flying toilet is a facetious name for a plastic bag that is used as a simple collection device for human feces when there is a lack of proper toilets (people are forced to practise open defecation). The filled and tied plastic bags are then discarded into ditches, on the roadside, or simply thrown as far away as possible.