Green’s Dictionary of Slang

(UK/Aus., usu. juv.) the teeth.

1840		T. Hood ‘Miss Kilmansegg & Her Precious Leg’ in Poems (1846) I 121: Turn we to little Miss Kilmansegg, Cutting her first little toothy-peg.
1853		‘Cuthbert Bede’ Adventures of Mr Verdant Green (1982) I 3: Pronounced by Mrs Toosypegs his nurse [...] to be ‘a perfect progidy, mum.’.
1880		Bulletin (Sydney) 18 Dec. 12/1: And when he comes a-cutting of his little toosey pegs. / He’ll be a man, he will, upon my word.
1892		H. Lawson ‘The Man from Waterloo’ in Roderick (1967–9) I 219: And so one day, before them all, / He dared to clean his teeth. [...] ‘It’s gone to clean its tooties!’ said / The Man from Ironbark.
1963–74		B. Humphries Barry McKenzie [comic strip] in Complete Barry McKenzie (1988) 106: Poor little Liz [...] she can’t even clean her toothy-pegs in private.
1999		Guardian Weekend 3 July 51: Does every adolescent [...] have to have their tender toothypegs sanded down.