Green’s Dictionary of Slang

monkey spanker n.

[rhy. sl. = wanker n.; ult. spank the monkey under spank v.1 ]

a masturbator; a general term of abuse.

C. Condon dumbentia.com 🌐 Monkey Spankers Anonymous. Because if you like spanking monkeys, we don’t want to know your name.
‘John’ ‘Do you believe in love at first sight, or should I walk by again?’ at Farshot.com Archives 🌐 Even the most untrained monkey spanker should succeed with these pimp lines: ‘Hey, don’t I know you? Yeah, you’re the girl with the beautiful smile.’.