There are a plethora of antonyms for the phrase "take it lying down". Some examples include "stand up for oneself", "fight back", "push back", "resist", "oppose", "defend oneself", "assert oneself", "confront", "challenge", and "object". These phrases imply taking action and not passively accepting a difficult or unfair situation. Taking something "lying down" suggests submission, weakness, and a lack of willpower, whereas these antonyms embody strength, resilience, and determination. By standing up for oneself and pushing back against injustice, one asserts their autonomy and self-respect, leading to a more fulfilling and satisfying life.