a phrase used to indicate extemporaneous speech or spontaneous improvisation

कोई भी तैयारी किए बिना बोलना

English Usage: The comedian decided to ad lib during his set when his planned jokes didn't land.

Hindi Usage: कॉमेडियन ने अपने सेट के दौरान बिना तैयारी के बोलने का फैसला किया जब उसके योजनाबद्ध चुटकुले नहीं चले।

to improvise or do something spontaneously, often without a script

बिना योजना के करना

English Usage: The actor had to ad lib his lines when the script was lost.

Hindi Usage: अभिनेता को अपनी पंक्तियाँ बिना योजना के बोलनी पड़ी जब स्क्रिप्ट खो गई।