lucky you, me, etc.

lucky (one)

An expression of pleasant surprise following some good fortune. (Can be used ironically to express the opposite.) You found $20 in your pocket? Lucky you! Oh, good, I've been selected for jury duty. Lucky me.
See also: lucky

lucky ˈyou, ˈme, etc.

(spoken) used to show that you think somebody is lucky to have something, be able to do something, etc: ‘I’m off to Paris.’ ‘Lucky you!’
See also: lucky