To "knock props from under" is an idiomatic expression used metaphorically to describe an action or event that undermines or weakens the fundamental support or foundation of something, causing it to become unstable, collapse, or be discredited. The phrase can be broken down into its constituent parts to better understand its meaning.
The word "knock," in this context, signifies the act of striking something forcefully, often leading to a destabilizing or disruptive effect. "Props" refer to external structures or supports used to reinforce or maintain the stability of an object or idea. These props are crucial in upholding the integrity, credibility, or reliability of the subject matter in question.
"From under" implies removing or dislodging the support from its foundational position. It suggests dismantling or eliminating the very basis upon which something relies. Consequently, "knocking props from under" something is an action that dismantles or weakens the essential foundation or pillars on which it depends.
This expression can be applied to various contexts, such as in debates, arguments, or discussions, where an individual or a piece of information decisively challenges and undermines the validity or credibility of an opposing viewpoint or theory. It can also refer to situations where a detrimental event or revelation shatters the foundational elements supporting an institution, relationship, or belief system, causing it to crumble or lose credibility.
Overall, "knocking props from under" signifies a drastic action that disrupts the fundamental support of something, leading to its destabilization, discrediting, or collapse.
