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2.
British slang for masturbation
John- *fap fap fap*
Bill- hey... what are you doing
John- Not slapping the monkey if thats what you think
by Shamingo June 18, 2011
 
1.
It is a procedure that involves whacking ones genitals for pleasure and for escaping the boredom of routine life.
Viren Naidu believes in slapping the monkey after a hard days night before he retires for the day.
by Kunal Guha September 06, 2005