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1.
A "Lover's Lane," breakdown lane, RV park, mountaintop, alley, or any other place couples park for the purpose of having sex in said vehicle.

Example: "Inspiration Point," often mentioned in the TV show "Happy Days."
"I took my girlie to the porking lot this weekend, and -- WOW-WEE! We must have burned 16 rubbers."
by Jason L. July 11, 2005
 
2.
A parking lot that is commonly known for having car sex.
Johnny took Jane out on a date to the porking lot last night.
by SomeChickInCali December 28, 2010