1 definition by D... and a few more letters

Top Definition
The act of copulating within the bounds of a reasonably large trunk of a car.
So, my girlfriend just suggested we have open trunk oral sex later today... but I said we might as well do the full deed in the trunk, seeing as this car is a rental and I have to return it in a few hours. As she says, trunk sex is hot.
by D... and a few more letters January 14, 2008

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