take charge of

(verb) to become responsible for a situation or person

Example Sentences:

A: Our boss went home sick. What should we do?
B: I think I will take charge of our office. Everyone listen to me!

I don’t like people who are always taking charge. I hate it when people tell me what to do!

When my parents went on vacation, I took charge of my younger brother.

Similar idioms:

1. take someone under one’s wing
2. see someone off
3. keep someone in line
4. take someone for granted
5. like taking candy from a baby