In boxing, the term "Down and Out" refers to a boxer who has been knocked down and is unable to get up unassisted to continue fighting.
This situation typically occurs when a boxer has been knocked out completely and is unconscious.
When a boxer is down and out, the referee will count to ten. If the boxer cannot rise to their feet unassisted within this count, the fight is over and the opponent is declared the winner by knockout.
This outcome is one of the most decisive ways to end a boxing match.