/kʌf ||; kʌf/noun[C] 1 the end part of a sleeve, which often fastens at the wrist 袖口；袖头 ☞picture on page C6 见C6页插图
2 cuffs [pl] =HANDCUFFS
3 a light hit with the open hand 以手掌轻拍
off the cuff (used about sth you say) without thought or preparation before that moment （指要说的话）未经思考或准备，临时:
I haven't got the figures here, but, off the cuff, I'd say the rise is about 10%. 我手头没有相关数字，但据我估计，上升幅度大约10%。