When you have sex with a MILF and her daughter simultaneously. Proof is generally required to confirm accomplishment of the act. Those who complete the task are encouraged to call their best friend, next of kin and/or parents. Automatically bestows legendary status by default.
Steve: "Hey Lenny I got your text last night at three in the morning, did you really get you some chicken and eggs?".

Lenny: "Hell yeah I did. I got the pictures right here to prove it".
by Lorethe2nd September 16, 2015
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A question of cause-and-effect or sequence of actions, possibly unanswerable.

From the eternal question "Which came first, the chicken or the egg?"
Did an earthquake cause the mine collapse, or was the collapse itself registered as the quake? This could be a chicken-or-egg problem.
by Man Machine August 12, 2007
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Translated from Spanish: pollo y huevos. A humorous way of saying penis and balls.
Did you get to play with his chicken and eggs?
by Onlylivonce July 21, 2016
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"Not only is there a killer party this weekend, but our Google AdSense account just paid us $1,000 for doing nothing!"
"Chicken and eggs and a pair of pants!"
by DougCo November 22, 2007
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A reference to the classic, epistemological problem of determining the (efficient) cause and a corresponding product amongst entities that could be argued to fill either, opposing roles.

Used more colloquially to laugh off an impasse in which the solution to a problem cannot feasibly be made to precede and solve that problem until said problem is already solved. Really, it can be downright abused on any pickle, dilemma or conundrum.
The interview is tomorrow but I’m still naked, broke and nobody will loan me money. If only I had a job so I could buy a suit. It’s a real chicken-egg problem.”
“Christian used this turn of phrase word for word in college back in 2007. But it’s been heard in use lately. Where’d it actually come from? Gaaaaw-lee, what a chicken-egg problem.”
by CSean7 January 18, 2018
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