1. (US) a blow over the head.
|On Many Seas 398: Come on now, me hearties! Step lively there! Who’s next for a hair cut?|
2. (US black) a week [the notional cutting of one’s hair on a weekly basis].
|Orig. Hbk of Harlem Jive 12: Ole man, it’s about a tray of haircuts on the backbeat when I nixes my pad.|
3. (UK prison) a short term of imprisonment, in a local prison from a few weeks to two or three months or in a convict prison for three to five years [the relatively short period and the cutting of one’s hair on arrival in prison].
|Lag’s Lex. 98: haircut. Any very short term of imprisonment. In a local prison, one or two months or weeks. in a convict prison, three to five years.|
4. (US Und.) a verbal telling-off.
|(con. 1953–7) Violent Gang (1967) 279: He was laughed at, ridiculed, and given a ‘haircut’ (a verbal dressing down) by other old-time con men.|
5. (N.Z.) winding back a car’s odometer.
|Reed Dict. of N.Z. Sl.|
SE in slang uses
see from arsehole to breakfast time under arsehole n.