Top Definition
"Women are like parking spaces: The good ones are always taken."

The theory that when unsure of whether or not a woman is single, that the likelihood of her being taken is directly correlated to how desirable she is.
Guy 1: I'm pretty interested in her but I'm not sure if she's seeing someone already.
Guy 2: A girl like her? Parking Lot Theory says you're too late.
by icaruswings September 08, 2004

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