1785. Grose, Vulg. Tongue, s.v.
1811. Lex. Bal., s.v.
Verb. (pugilistic).—1. To strike in the mouth.
1851–61. Mayhew, Lond. Labour, I. 233. Razor George and his moll
slept here the day afore Christmas; just out of ‘stir’ (jail), for
muzzling a peeler.