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".

Someone who is possessed by clout chasing. The original human is now gone and a demonic entity that feeds on clout is all that is left. An empty shell with no control of their actions, forced to blindly react to situations they think will bring them attention.

A death box is a hot box with both marijuana smoke and cigarette smoke.

A computer whose user spends far more time on it than is healthy.

A Television

A computer whose user spends far more time on it than is healthy.

to do something crazy or insane