The phrase "pushes luck" means testing one's fate or taking unnecessary risks. There are a variety of synonyms to describe this behavior, including gambling, tempting fate, courting disaster, playing with fire, pushing one's limits, and tempting providence. These phrases all describe someone who is taking a chance or challenging their luck in a situation that could potentially have negative consequences. While there may be moments where pushing one's luck pays off, ultimately it is a risky behavior that can lead to trouble. It is important to weigh the potential outcomes of a decision before making a move that might push luck too far.