Green’s Dictionary of Slang

bunt n.1

[SE bunt, the part of a fishing net that forms a bag or pouch’]

1. an apron.

[UK]Hell Upon Earth 5: Bunt, an Apron.
[UK]Grose Classical Dict. of the Vulgar Tongue ms. additions .
[UK]Grose Classical Dict. of the Vulgar Tongue (2nd, 3rd edn).
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.

2. (later use US gay) the buttocks.

[UK]‘Bill Truck’ Man o’ War’s Man (1843) 13: A simple snaffler or two in the bunt is nothing at all.
[US]Bruce Rodgers Queens’ Vernacular.
[US]R.O. Scott Gay Sl. Dict. 🌐.