A rueful and ironicway of wishing someone success when it is obviously impossible: Vance played a key part in negotiating the Camp David agreements on the Middle East, but lots of luck in getting him to say so/ Looking for a lady loan shark? Good luck; mob jobs remain male turf
[the first form is sometimes uttered in a jokey Asian way: ''Rots of ruck'']
If such an attitude is meant to intimidate Muslim women, good luck.
It turned out that Rockaway had finally gotten at least a measure of good luck with the bad.
And good luck getting the song (and music video) to “Chandelier” out of your head.