L'drop
A sneaky, quick hand-job done in a moving car near Chicago, usually while the other person is too distracted to notice it happening.
"He gave me an L'drop in the middle of the highway. I didn't even know it happened."
"Got an L'drop while we were stuck in traffic. I was too busy to notice."
"She gave me an L'drop in a moving car. I almost screamed from the surprise."