gully trap

plural gully traps

1. AustraliaNew ZealandA trap (preventing the return of gases) through which household drainage can flow to reach outside drains, or the structure in which this is housed.

   Charlie Dabney subsided into an imperceptible chair, and somersaulted in the direction of the gulley-trap. He fell heavily.

   1963, Ronald Hugh Morrieson, The Scarecrow, Text Classics, published 2012, page 172

   1 more example

   They bung the tea leaves in the sink, instead of toddling out the back and emptying them on the maidenhair or in the gulley trap.

   1990, Barry Humphries, The Life & Death of Sandy Stone, page 83