luck

as luck would have it used to indicate the fortuitousness of a situation.

1994Beryl GilroySunlight on Sweet Water As luck would have it, one day they met in the door of the rum shop.

beginner's luck: seebeginner.

down on your luck: seedown.

Lady Luck: seelady.

the luck of the devil (or the devil's own luck) (undeserved) good luck.

2004Electric Newspaper (Singapore) They [Manchester United] take on Fulham who … have been having the 'luck of the devil'. But while they have looked fluent at times, their good fortune should run out at Old Trafford tonight.

the luck of the draw the outcome of chance rather than something you can control.

the luck of the Irish very good luck.

make your own luck be successful through your own efforts and opportunism.

push your luck: seepush.

ride your luck let favourable events take their course without taking undue risks.

take pot luck: seepot.

try your luck (at something) do something that involves risk or luck, hoping to succeed.

1964Mary StewartThis Rough Magic I finally decided, after three years of juvenile leads in provincial rep that it was time to try my luck in London.

your luck is in (or out) you are fortunate (or unfortunate) on a particular occasion.