"Knocking props from under" is an idiomatic expression that is derived from the metaphorical use of the word "props" to mean support or encouragement, and "knocking" as a metaphorical action representing undermining or removing that support. This phrase is used to describe the act of systematically or intentionally destabilizing something or someone by destroying or weakening the foundations or pillars upon which they rely.
In a figurative sense, "knocking props from under" refers to taking actions or making statements that deliberately undermine or weaken someone's self-confidence, reputation, or position of authority. It entails working towards dismantling the support or belief systems that bolster or sustain a person or a situation. This action can be carried out through various means, such as spreading rumors, exposing flaws, challenging assumptions, criticizing achievements, or questioning credibility.
The phrase suggests that by challenging the very foundation of someone's beliefs, values, or achievements, the intention is to diminish their credibility, authority, or influence. Consequently, "knocking props from under" represents a deliberate strategy employed to weaken or overthrow a person's position, status, or influence by targeting their sources of support, legitimacy, or confidence.
Overall, "knocking props from under" represents a figurative action aiming to erode the support system or undermine the foundations that someone or something relies upon, typically with the intent of destabilizing that person or situation.
