The phrase "hadst egg on one's face" implies embarrassment or shame resulting from a mistake, faux pas, or a personal failure. Antonyms for this expression could include "victory," "triumph," or "success," indicating a state of achievement or accomplishment rather than failure. Other antonyms may include "confidence," "assurance," "poise," or "self-assurance," suggesting a sense of ease or composure in social situations. Additionally, "rectitude," "integrity," "uprightness," or "dignity" can serve as antonyms, indicating a sense of moral or ethical responsibility that was not compromised by a personal error or misjudgment.