"Pushing luck" is a phrase used to describe someone who is tempting fate or taking unnecessary risks. It can also be seen as foolhardy or careless behavior that may have negative consequences. Synonyms for this phrase can include "tempting fate", "playing with fire", "pushing the envelope", "living dangerously", "walking on thin ice", "chancing it", "pushing one's boundaries", "going beyond one's limits" or "pushing the threshold". All of these synonyms imply the act of taking risks that may result in undesirable outcomes. It's important to be aware of this behavior and avoid it when possible in order to minimize potential harm or mistakes.