The story
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A weight rack on which the rest of the bar is levered away automatically or by a spotter so the (at heavy weights injury-risky) repositioning of the athlete’s legs for a squat (the walkout) or shoulders for a benchpress can be avoided for execution of the exercise. Full definition →
Etymology from Wiktionary, CC BY-SA 4.0.