off the cuff
US /ɔf ðə kʌf/
UK /ɔf ðə kʌf/

1.
tanpa persediaan, spontan, serta-merta
without preparation; impromptu
:
•
He gave an off the cuff speech at the party.
Dia memberikan ucapan tanpa persediaan di majlis itu.
•
I don't have an answer off the cuff; I need to check the data.
Saya tiada jawapan serta-merta; saya perlu semak data.