Worse luck!
Definition 1 of 1
Pro Tip 1/3Expressing Regret
Use when something negative has happened or will happen and you wish it were different. 
I lost my keys, worse luck, so I can't go out tonight.
Pro Tip 2/3Colloquial Use
It's a casual phrase, not suitable for formal writing or speeches. 
We're playing against the champions, worse luck, so don't expect an easy game.
Pro Tip 3/3Tone of Voice
The phrase often carries a tone of dry humor or resignation. 
I've been assigned to clean up, worse luck, so no extra break for me.