To assume or plan based on uncertain outcomes or events that haven't happened yet.

किसी अनिश्चित भविष्य पर आधारित योजना या अनुमान लगाना

English Usage: Don't count your chickens before they are hatched; the deal isn't finalized yet.

Hindi Usage: शेखचिल्ली की तरह मत सोचो; सौदा अभी पक्का नहीं हुआ है।