catch up on

US /kætʃ ʌp ɑːn/
UK /kætʃ ʌp ɑːn/
"catch up on" picture
1.

to do something that you have not been able to do recently and that you need to do

:
I need to catch up on my sleep this weekend.
She spent the afternoon catching up on her emails.
2.

to learn or hear about the latest news or information about someone or something

:
Let's meet for coffee and catch up on all the gossip.
I called my friend to catch up on her news.