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
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug