Green’s Dictionary of Slang

1. inclining more to one side than another; crooked.

1788, 1796		Grose Classical Dict. of the Vulgar Tongue (2nd, 3rd edn).
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.

2. (UK Und.) picking a pocket [? one chooses one pocket over another].

1859		Matsell Vocabulum.
1895		C. Crowe Aus. Sl. Dict. 56: Partial, stealing.