Car Park Kareoke 

To receive oral pleasure in the back of a car, often parked in the cinema car park or near the nightclub where you met your catch (often likely to be a right slut, or camped up mincer).

"Where's Robinson?"
"Oh he's singing into kitten's microphone in the back of his landrover. Those two love their Car Park Kareoke "

Car Park Kareoke by Winston Churchill and the sausage fest November 1, 2005

car park karaoke 

Car park karaoke is another term for an outdoor blowjob

We were in the nightclub and I managed to pull this chick. We went outside and she sung down the purple headed microphone in a spot of car park karaoke.
The 2 terms 'car park karaoke' and purple headed microphone' are usually used in conjuction with each other.

car park karaoke by Paul Daley May 10, 2008