Bad luck is said to somebody who has just missed out. Bad luck, better next time, oh, bad luck.
As a sympathy phrase it insists the failure was chance rather than fault, which is the kindness in it. As a plain noun it simply means misfortune.
1phrasebad luckSaid to somebody who has just missed out.
“Bad luck, you were only a point behind.”
bad luck is a phrase.
Practised in Small Talk & Everyday Phrases