1 definition by johnnytherock

Top Definition
Having group sex with two or more MILFs, at the same time.
Guy #1: You can't have a MILFshake if you had sex with one at 10:00PM and another at 6:00AM.

Guy #2: What the hell is a MILFshake?

Guy $1: When you get two or more MILFs and everything starts shaking around.
by johnnytherock July 05, 2011

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