Green’s Dictionary of Slang

paw adj.

[? excl. pah!, nasty! horrible!]

improper, naughty, obscene.

[UK]Wycherley Country-Wife V ii: pinchwife: What, you take her for a wench, and me for a pimp? horner: Pshaw! Wench and pimp, paw words.
[UK]Congreve Love for Love V i: O fie, marrying is the paw thing.