A situation or problem that is different from what was expected.

एक स्थिति या समस्या जो अपेक्षा से भिन्न है।

English Usage: Life threw him a curve ball when he lost his job unexpectedly.

Hindi Usage: जीवन ने उसे एक कर्व बॉल फेंकी जब उसने अप्रत्याशित रूप से अपनी नौकरी खो दी।