The opposite of 'Gangsta Lean', when driving a car.
The car has to be a large saloon, with plenty of leg room and seat manoeuvreability for this to look right. The Driver pushes his seat back as far as lets his left arm (in UK) hang straight out on the steering wheel. He then slouches down into his seat whilst leaning sideways against his door, resting his right elbow on the window rim, ciggy (or beer, if you ARE Scratchy!) hanging in limp right hand. A sour/cool expression is then cultivated as you motor around looking for Pool-halls in the night.
"Check the Chav doing the Scratchy Lean in his wanked-up 205!!!"