Green’s Dictionary of Slang

bracket-face n.

an ugly person; thus bracket-faced adj.

[UK]B.E. Dict. Canting Crew n.p.: Bracket-face Ugly, Homely, Illfavor’d.
[UK]New Canting Dict.
[UK]Bailey Universal Etym. Eng. Dict.
[UK]B.M. Carew Life and Adventures.
[UK]Grose Classical Dict. of the Vulgar Tongue n.p.: bracket-faced. Ugly, hard-featured.
[UK]G. Andrewes Dict. Sl. and Cant.
[UK]Lex. Balatronicum.
[US]R. Waln Hermit in America on Visit to Phila. 2nd series 27: A hanger-on to bracket-faced, carotty-pated, gravy-eyed ape-leaders.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[UK]G. Kent Modern Flash Dict. 7: Bracket face – devilish ugly.
[UK]Flash Dict. in Sinks of London Laid Open [as cit. 1835].
[UK]Duncombe New and Improved Flash Dict.
[US]M.G. Hayden ‘Terms Of Disparagement’ in DN IV:iii 217: bracket-faced, ugly. ‘She’s bracket-faced, but I like her just the same.’.