Rotten luck American informal slang
Used to refer to something extremely unlucky or unpleasant happens.
Dam it. I've got rotten luck today.
"She was hit by a car on the way to the job interview" - "Such rotten luck. Poor girl".
She always has rotten luck when we play the guessing game.
Said when one is looking back on something enjoyable or worthwhile in the moment that it was happening even though it was impermanent
The party came to an end, but it was fun while it lasted.