Green’s Dictionary of Slang

(US) combining form that indicates an enthusiast, a devotee, e.g. sex-machine, rap-machine.

1932		DeLeon & Perelman Hold ’Em Jail [film script] The greatest football machine that ever thundered down the field! [HDAS].
1963		M. Spillane Return of the Hood 20: Big Primo Stipetto didn’t like his sex machines playing around in other back yards.
1983		Eble Campus Sl. Mar. 4: -machine – a person who does a lot of activity [...] study machine.
2001		J. Baker Shooting in the Dark (2002) 144: He’s a brilliant actor, he’s a sex machine, multi-millionaire.