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This is when a woman has recently had a baby and her husband/boyfriend still wants to get it on. The woman is asked to perform oral sex to her man while still taking care of the baby. Thus the milkshake is the act of performing head while continuing to allow the newborn to suckle on her teet. Effectively making this a threesome including a man, woman and baby.

Att: Baby can not be older than 4 years old.
The baby is crying and I'm horny....it's time for a Kenyan Milkshake.
by DougBoyFresh July 10, 2009
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2
A mixture of feces, urine, and semen, mixed together by an erect penis, and served chilled.
I treated my girlfriend to a real treat the other night when I made her my famous Kenyan Milkshake!
by juan jorge castro March 21, 2011
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