push your luck

push (one's) luck

To risk losing the good favor or fortune one has garnered thus far by brashly or overconfidently seeking more. I know you're in the boss's good graces now, but don't push your luck. She's been known to turn on people for getting too cocky. I've had some good winnings at blackjack, but I don't think I should push my luck any further. The construction happening near our building has really put a damper on sales this month.
See also: luck, push

push your luck

COMMON If you push your luck, you do something risky that could spoil the success you have already had. You survived this time but who knows how far you can push your luck? You might be pushing your luck asking them to play the song live.
See also: luck, push