To deck is too: Take your skateboard and smash it against someone's face. To get decked: Too get smacked by a skateboard. Most likely to knock you the fuck out.

To say a car is decked is to point out the fact that the car is extremely low off the ground.

to lower the suspension on your automobile.

To be decked or get decked get really told off.

To purposely ignore someone. To dick someone over. To hit the ignore button on your cell phone when someone calls.

to get laid

have sex