Quid Pro Quo can mean a few things. It basically means the exchange of something for equal value. The term quid pro quo is usually used in the legal profession. It can also mean the substitution of something.
Quid pro quo can often mean the trade of something as well. Many movie goers will remember Hannibal Lectur (Anthony Hopkins) using the term in the movie Silence Of The Lambs, and also Dr. Evil in the Austin Powers movie Goldmember. In Goldmember, Myers is actually spoofing Silence of the Lambs.
Here is the Wiki line on the definition of Quid Pro Quo;
Quid pro quo is a legal term for the transaction of valued items or favours, in return for giving something of value. Quid pro quo is generally used when the balance of equity and the quid pro quo are excessively “in question”.










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