Green’s Dictionary of Slang

luck n.

also good luck
[pvb ‘Shitten luck is good luck’]

stepping into a heap of excrement.

[UK]Grose Classical Dict. of the Vulgar Tongue n.p.: Luck, or good luck, to tread in a sirreverence, to be bewayed, an allusion to the proverb, in sh—tt—n luck is good luck.
[UK]Lex. Balatronicum [as cit. 1785].
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue [as cit. 1785].

SE in slang uses

In phrases

break luck (v.)

1. of a prostitute, to encounter the first customer of the day.

[US]‘Boxcar Bertha’ Sister of the Road (1975) 171: We work in turns ’til every girl ‘breaks luck,’ and then it’s choice.
[US]‘Iceberg Slim’ Pimp 111: Ten minutes after she got down she broke luck.
[US](con. 1950s) D. Goines Whoreson 98: I didn’t break luck till early this morning.
[US]J. Sayles Union Dues (1978) 182: Out on the rack nearly an hour and a half and she still hadn’t broke luck.
J. Robinson Gospel of the Game 3: You better hope that you break luck [...] you had better have my money, bitch.

2. in general use, to have a piece of good fortune.

[US](con. 1960s) D. Goines Whoreson 229: I had reason to believe I just might break luck tonight.
change one’s luck (v.)

1. (US) for a white person to have sex with a black person (esp. for the first time).

[US]H.N. Cary Sl. of Venery I 43: Changing One’s Luck – To have carnal knowledge of the black woman. A superstitiion.
[US]‘J.M. Hall’ Anecdota Americana I 106: Eager to ‘change his luck’ a white man approached a negress. ‘Ah charges two dollars,’ said the black whore.
[US]Wentworth & Flexner DAS 93/1: change [one’s] luck To have sexual intercourse, esp., in the South, with a Negress; used only by white males.
[US]C. Himes Pinktoes (1989) 63: Mamie’s father was a white pimp who had conceived her accidentally while changing his luck with the colored maid in the whorehouse.
[US](con. mid–late 19C) S. Longstreet Wilder Shore 216: Various desires for perverted debauchery could be satisfied in the stalls, cribs or in alleys [...] getting one’s ashes hauled, changing one’s luck.
[US]R.A. Wilson Playboy’s Book of Forbidden Words 63: Think I’ll go uptown and change my luck.
see sense 2.

2. (US gay) to perform homosexual sex for the first time.

[US]B. Rodgers Queens’ Vernacular 43: change one’s luck 1. to go to bed with a black man for the first time [...]. to perform a homosexual act for the first time.
luck of Eric Connolly (n.) [proper name of Eric Connolly (d.1944), known as an exceptionally lucky gambler]

(Aus.) a description of any lucky person.

[Aus]F.J. Hardy Four-Legged Lottery 134: Jim Roberts announced his amazing win of approaching two hundred pounds [...] and Tom Roberts said: ‘Well, I’ll be damned. We’ve got an Eric Connolly in the house!’.
[Aus]F.J. Hardy Legends from Benson’s Valley 73: ‘They’ve had the luck of Eric Connolly all night,’ Darky said.

In exclamations

half your luck!

(orig. Aus.) signifying envy, jealousy of the person addressed, i.e. I wish I had ...

[[Aus]Queenslander (Brisbane) 22 Dec. 6/2: If your mare is as good as she is said to be, win the race into the bargain. I only wish I had half your luck].
[[UK]Yellow Book 47: I wish I had half your luck. [...] Oh, heavens, what wouldn’t I give for half your luck!].
[UK]Cliffe & Moore [perf. Marie Lloyd] The Coster’s Wedding [lyrics] And all the market blokes, they cracked some spicy jokes / For they said, ‘Wot ho! Good old Billy! ’Arf your luck’.
[Aus](con. WW1) Burra Record (SA) 31 mar. 3/4: The boys simply loved us to wear new clothes. They would call out ‘When are you going to get a new frock?’ And when the men wore dress suits, they would yell, ‘Half your luck, Digger!’.
[Aus]Sun. Mail (Brisbane) 22 June 5/5: ‘Half your luck!’ This wistful, expression is one of the commonest, and voices a very human aspiration.
[Aus]Sun (Sydney) 6 July 19/4: All glad, all cheery, all saying, ‘half your luck, old boy,’ the pals who show no envy, only joy that one of the bunch should ‘click’.
[Aus]Wingham Chron. (NSW) 25 Jan. 6/3: Returning papers, we enjoyed a laugh and a yarn. ‘I happen to be going to that town,’ I said. ‘Half your luck,’ said my companion.
[US]News (Adelaide) 24 Feb. 23/1: The day before the businessman left for Australia he told Ken he was going home. ‘Half your luck,’ said Macca.
O. White Under the Iron Rainbow 1: Half your luck, old man, half your luck! I never manage to get more than five or six days in the North West at any one time.
[Aus]Aus. Women’s Wkly 10 Apr. 43/4: ‘Half your luck,’ said the Governor's wife [...] on hearing of Mrs. Schultz's trip.
[Aus]R.G. Barrett Real Thing 86: ‘I might even give the missus a tap on the shoulder when I get into bed’ [...] ‘Half you luck,’ chuckled Les.
K. Walker Peter (2001) 64: ‘But I never have nightmares,’ ‘Half your luck,’ he said, like he wasn’t a hundred percent convinced.
Arcadia Flynn ‘It’s Time’ [Internet] I’m thirty six and single / Children? not a one / Half your luck ... I hear you say, / I’ll bet you’re having fun!
[Aus]R.G. Barrett Mystery Bay Blues 31: ‘I’m at Clover’s [...] I’ll stay at her place tonight.’ ‘Half your luck’.
T. Wright Turn Right at Istanbul n.p.: It took ten minutes of knocking and ringing before the receptionist appeared and unbolted the door. He had been asleep, he said. Half your luck, I replied.