Tough luck
Definition 1 of 1
Pro Tip 1/3Empathy Lacking
Use 'tough luck' when you don't have much sympathy for someone's unfortunate situation. 
Missed the bus because you overslept? Tough luck!
Pro Tip 2/3Casual Tone
It's often used among friends or in casual conversations, not in serious or formal situations. 
Oh, tough luck, you'll win the game next time.
Pro Tip 3/3Slight Teasing
'Tough luck' can imply teasing or a friendly joke, not to be taken too seriously. 
You had to do chores instead of going out? Tough luck, pal!