Driving while leaning back or leaning to the side on the driver's side door or the other way, toward the center console. Only one hand on the wheel, most likely you're left, because your right hand will be changing the radio stations. Also known as sittin sidewayz.
Hey, get your lean on while you drive down the highway listening to Biggie Smalls.
-or-
I was driving down the highway gettin my lean on while listening to Biggie Smalls.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."