Green’s Dictionary of Slang

1. (UK black) without any form of disguise.

2020

G. Krauze What They Was 46: I imagine myself running into her yard on a rago tip, bareface with a borer, and start shanking her stepdad.

2. used as n. for one who refuses, without a medical reason, to wear a mask during the Covid pandemic.

2020

Urban Dict. 22 July 🌐 Bareface Somebody who refuses to wear a mask without a legitimate reason not to.He came into my shop without a mask, so I turned that bareface away.