Green’s Dictionary of Slang

parkering ninty n.

wages.

1893		P.H. Emerson Signor Lippo 48: It only costs me cinque soldi and it’s a treat for I get no parkering-ninty.
1984		Partridge DSUE (8th edn) 855: [...] since ca. 1860.
2019		P. Baker Fabulosa 296/1: parkering ninty wages.