This is a small rectangular section of an in-ground pool recessed into the top of the pool wall. This recess forms a small bench or platform. It is refered to a "swimout" in the commercial pool industry.
The "swimout" became the "deathbox" as skaters (i.e. the z-boys) began to ride the vertical walls of pools in much the same way as the face of a wave can be surfed. This recess offered the skater a excellent opportunity to leave the surface of the pool altogether, catch some air, and then drop back into the bowl of the pool. If re-entry was not done correctly, things could go horribly wrong, and thus the name "deathbox".
Brah are you okay, I thought you were a gonner when you bailed on that deathbox.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the USCoast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.