A common driving position in which the driver holds the wheel with his left hand while leaning to his right toward the passenger seat, usually bobbing his head or bumpin' with the beat. It's a pretty badass way to drive. This move works best in a Chevy Caprice or any pimp-style car with a 3-person front seat.

"...with a hellafied gangsta lean, gettin' funky on da mike like an ol' bunch of collard greens..." -Snoop Dogg

Sammy was gangsta leanin' so hard yesterday that his head was partially out the passenger window. What a pimp.