Green’s Dictionary of Slang

botch n.1

also botcher
[abbr. SE botcher, one who repairs or patches; also note SE bodger and dial. botch, a cobbler]

a tailor.

[UK]Harris’s List of Covent-Garden Ladies 58: Poor R-shb--k! how thou art fallen [...] to take up with a taylor, the ninth part of a man – a fellow made up of old measures and list – a cabbage of cloth – a botcher.
[UK]Grose Classical Dict. of the Vulgar Tongue ms. additions n.p.: Botch a Nick name for a Taylor.
[[UK]‘Peter Pindar’ ‘The Remonstrance’ Works (1794) III 78: I’m a poor botching tailor].
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.