L'drop
A sneaky quickie hand-job given in a moving car somewhere near Chicago, usually while the driver is too distracted to notice what's going on.
"I got an L'drop during the highway traffic. My driver was too busy yelling at a truck."
"He gave me an L'drop in the back of a taxi. The driver thought we were just arguing."
"Got an L'drop on the expressway. The car swerved, but no one knew why."