Green’s Dictionary of Slang

hairy n.1

1. a horse.

[US]T. Hampson diary 25 Aug. [Internet] The recognised distance for heavy draught animals to cover in a day is 14 miles, so our hairies had done pretty well today.
[UK]‘New Church’ Times 17 Apr. (2006) 53/1: Groom, turn the hairy out to grass!

2. (Scot., a woman, esp. Glasgow) a poor woman [the premise is that a wealthier woman would wear a hat and hide her hair].

[UK](con. 1920s) McArthur & Long No Mean City 31: She was, quite definitely, ‘one of the hairy’ – a hatless slum girl.
[UK]B. McGhee Cut and Run (1963) 10: The Glasgow street-corner girl is sometimes known [...] as a ... HAIRY ...
[UK]P. Theroux Family Arsenal 29: That hairy over their pulling pints.
[UK]I. Welsh Filth 150: That wee hairy last night, I should have fucked her up the arse.
[UK](con. 1980s) I. Welsh Skagboys 295: Could pimp her oot easy. Like some ay they wee hairies around here.