2 definition by Big papa daddy swag

Top Definition
A sexual act in which a pregnant woman (hence the large size) shoves one of her breasts between another pregnant woman's breasts and shakes them side to side.
Ugh don't look at that large size milkshake
by Big papa daddy swag July 07, 2016

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A sexual act in which a white women (hence the vanilla) shoves one breast in between another woman's breast And shakes it side to side.
Damn did you see them vanilla milkshake!
by Big papa daddy swag July 06, 2016

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Buy a Vanilla milkshake mug!