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Usually requires a menage-a-trois involving one man and two women. One woman performs oral sex while the other performs a rimjob(please see definition of rimjob if you are unfamiliar with the term) At the height of clmax, the male ejaculates copious amounts of semen into the fellating woman's mouth while simultaneously taking a dump in the mouth of the woman giving him the rimjob. Both women then hold their respective treasures in their mouth, face each other, and engage in a deep, passionate french kiss. This mixes the shit and the semen in both their mouths resulting in "milk and cookies"

*Note-this can be performed on one woman or one man, however it takes a lot of patience and practice. One either has to hold a mouthful of semen while taking a mouthful of shit or vice versa. It should also be noted that it IS possible to make one's self a milk and cookies, but eating your own is just yucky.
John invited the old widower from next door over last night, and we talked her into sharing John's milk and cookies
by Kyle Bucket November 03, 2010
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5
Sucking a girls tits while giving her anal
"dude, last night jessie let me do milk and cookies. I was suckin on her tits so hard it fucking made them red, while she was shoving my dick right up her ass"
"your one lucky mother fucker"
by akljds June 05, 2007
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6
When a woman (or man) places a cookie between their butt cheeks and pours milk down their back while the other person eats the cookie.
I'm going to give you some milk and cookies you'll never forget.
by Just_nasty July 30, 2011
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7
Used as slang for health and ammunition in the xbox title Halo. Most commonly used by nerds with little or no social life.
Aw snap yo, i need some milk and cookies now or im toast. Yeah thats right
by Knip September 16, 2004
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