To masturbate violently while eating fast food, possibly while watching TV.
Jill got Joe Burger King and watched him McMasturbate
by Thefatkidisherez February 11, 2010
1 more definition
When a person ignors social contact with friends in the kitchen because they are too busy masturbating to the TV programme "Glee"
My Friend cant come to the kitchen, hes too bust McMasturbate(ing).......
by Anonomoose123 December 03, 2010