Green’s Dictionary of Slang

Rosy Palm (and her five sisters) n.

the hand, as used in masturbation.

1972		T. Weesner Car Thief (1973) 67: You never gonna get no broad, man [...] You get Miss Rosy Palm all yo life, man.
1972		R.A. Wilson Playboy’s Book of Forbidden Words 105: Male masturbation [...] fucking Rosy Palm and her five sisters.
2001		‘Randy Everhard’ Tattoo of a Naked Lady 52: I hadn’t been so raw since the first time I met Rosy Palm and her five sisters.
2003		CindyET ‘Mulder, Please Stay’ on CindyET’s Fanfic 🌐 The spring-loaded Kleenex dispenser I set up beside the VCR should pretty much prove the only sex I’m getting anymore is with Rosy Palm and her five daughters.
2012		(con. 1980s) I. Welsh Skagboys 67: Youse two probably ended up [...] shaggin the lovely ‘Pam’ again.

In phrases

have a (big) date with Rosy Palms (v.) (also have a date with Rosy Palmer and her five sisters, date Rosy Palm and her five sisters, entertain Rosy Palm and her five daughters, get off with…, visit...)

to masturbate.

1997		‘Manlover’ ‘Top Training’ on Nifty Erotic Stories Archive 🌐 It seemed every guy I met was dating Rosy Palm and her five sisters or he was ‘a bottom’ looking for ‘a top’. Top men were becoming extinct.
1998		‘Mike Chuck’ Master List 🌐 a.k.a. the masturbator list [...] date with rosie palmer and her five sisters.
2000		Sex-Lexis 🌐 visit Mrs. Palm and her 5 daughters; visit Rosy Palm and her five daughters.
2001		‘Mr1beagle’ ‘Houston’ Part 1 on Nifty Erotic Stories Archive 🌐 It was too hot even to get off with Rosy Palm and her five daughters.
2002		R. Mitchell ‘Raison de Vivre’ Stargate FanFic on Rod and Sue’s Web Pages 🌐 He was a lay preacher. I was about thirteen or fourteen at the time and one day he caught me entertaining Rosy Palm and her five daughters. I think he thought he’d suddenly discovered a Son of Satan.
2002		Turnandburn 🌐 Masturbation — Male [...] have a big date with Rosy Palms, have a small stroke, have a rendezvous with Mrs. Hand.