What is the meaning of "crack the whip"?

The meaning of "crack the whip" is:

become very strict and serious about something


What is the definition of "crack the whip"?

The definition of "crack the whip" is:

become very strict and serious about something



"crack the whip" means

become very strict and serious about something

Example Sentences:

I was late for work three times, so my boss cracked the whip. If I’m late one more time, I’m fired!

After her husband cheated on her, she cracked the whip. Now, her husband has to call her every ten minutes, and wear a GPS tracking device.

I trust you, but don’t make me crack the whip!

Media and Links:

Time to crack the whip

Cracking the whip