鞭

Here are some expressions using whip:

• crack the whip
• have a whip-round
• whip up

Crack the whip = become strict

• The staff are not working hard enough so it's time to crack the whip.
• I need to crack the whip with my son because he never cleans his room.
• They lack self-discipline so you need to crack the whip sometimes.

Have a whip-round = collect money

• We're having a whip-round for Mr Suzuki who is leaving the company.
• Let's have a whip-round and buy Yuki a birthday present.
• Can you have a whip-round for Ken's stag party?

Whip up = make something quickly without preparation or planning, especially food

• We arrived home very hungry so I whipped up some sandwiches.
• I haven't been shopping but I can whip something up for dinner.
• You've forgotten about the business report?! You'll have to whip one up before Friday's deadline.