Green’s Dictionary of Slang

1. (US) a person employed on a film set to arouse an actor physically before filming a sexual episode, thus fluff, to create an erection using the hand (see cite 2012).

c.1955		‘Swasarnt Nerf’ et al. Gay Girl’s Guide (3rd edn) n.p.: [caption of man being brought to erection by fellatio] The Busy Fluffer!
1992		D. Jarman diary 21 Mar. Smiling in Slow Motion (2000) 101: Met a ‘fluffer’ from Colt Studios – a rather nice young man who was employed to give blow-jobs to porn stars.
1997		Roger’s Profanisaurus in Viz 87 Dec. n.p.: fluffer n. A female employed on the set of porno movies to stimulate male actors between takes.
1998		L. Stringer Grand Central Winter (1999) 127: On every smut film there is a particular individual whose sole function is to make it hard for the leading man, so to speak [...] This person is known as the ‘fluffer’.
2006		Wikipedia 🌐 A fluffer is a hired member of the crew of a pornographic movie whose role on the set is to sexually arouse the male participants prior to the filming of scenes requiring erection.
2007		E. Morrison Swung 330: A big-assed older woman was being fluffer, on her knees, getting the men ready.
2012		R. Milward Kimberly’s Capital Punishment (2023) 371: They presumably undresses, or freshen up, or fluff themselves.
2021		T. Pluck Boy from County Hell 245: [of a gun dealer] ‘I’m not sure I can get Rambo’s fluffer to pay what he owes’.

2. an erection.

2002

A. Owings Hey, Waitress! 311: ‘I grab guys’ balls occasionally.’ [...] ‘Some guys like it,’ she added. ‘You can feel a little fluffer coming on sometimes. [...] A boner.’.