1. a married man’s mistress, a wife’s lover.
|DSUE (8th edn) 84/1: since ca. 1935.|
2. (US black) a friend.
|Jive and Sl.|
3. (also bit of spare) an unattached woman, considered to be open to male sexual advances; thus have a bit of spare v., to commit adultery.
|Flesh Peddlers (1964) 284: ‘Anyway, I’m taking a girl along.’ Ira shrugged his shoulder. ‘Nothing like a spare.’.|
|Signs of Crime 201: Spare, to have a bit of Sexual liaison outside marriage, adultery [...] Spare An unattached female.|
|Lowspeak 131: Spare – a female available for extra-marital intercourse.|
4. an idiot, a boring person.
|Last of the High Kings 122: ‘Don’t be such a spare,’ Hopper said.|
5. an unattached person.
|Indep. Rev. 18 Feb. 5: No one ever looks outside the square for a sexual partner, with the result that the most fabulously improbable pairings go on as any old pair of spares fall for each other.|