Green’s Dictionary of Slang

wass n.

[? SE waste]
(UK black)

1. a fool.

[UK]T. Thorne (ed.) ‘Drill Slang Glossary’ at Forensic Linguistic Databank 🌐 Wass - stupid person.

2. nonsense.

[UK]T. Thorne (ed.) ‘Drill Slang Glossary’ at Forensic Linguistic Databank 🌐 Wass - nonsense, stupid talk.