lucky stone noun

A stone with a natural hole through it (carried for good fortune)

lucky strike noun

A stroke of luck

down on one's luck (informal) see under down¹

get lucky (informal)

1. To have a stroke of luck
2. To succeed in initiating a sexual relationship

I should be so lucky

An ironic expression meaning loosely, ‘that kind of luck does not happen to me’

luck into or upon (informal)

To get or come across something by chance

luck out (N American)

To have a run or instance of good luck

no such luck (informal)

Unfortunately not

push one's luck (informal)

To try to make too much of an advantage, risking total failure

touch lucky (informal)

To have good luck

tough luck (informal)

An expression of real or affected sympathy for someone's predicament

try one's luck (at)

To attempt something

worse luck (informal)

Unfortunately