To suddenly become too frightened to do something that you had planned to do, especially something important such as getting married.

अचानक घबराहट में कुछ न कर पाना, विशेष रूप से किसी महत्त्वपूर्ण कार्य को जैसे शादी।

English Usage: He was all set to propose to her, but he got cold feet at the last moment.

Hindi Usage: वह उसे प्रपोज़ करने वाला था, लेकिन आख़री पल में वह घबरा गया।