You can tell who's doing a gansta lean by how stupid they look in there cars. They are almost in the passenger seat while driving. This looks even funnier when the person is driving a crappy car like a Grand Am or some Ricer car.
I saw that kid driving his riced out Eclipse and doing a gangsta lean so I put up my finger for him. He then procedded to turn around and catch up to me by the next stoplight. I then beat his ass down in my American Camaro.