Cheered up means became happier or more positive after being sad, or made someone feel that way. It suggests a lift in mood from good news, comfort, kind words, or a small treat.
Before you go to bed, think of three things that went well today. I don't care if it's a little crazy thing – it doesn't matter...Take some music you love and if you can't dance, go do 10 minutes of jumping jacks. Get yourself all cheered up. Goldie Hawn
We wring our hands over the miscarriages of technology and take its benefactions for granted. We are dismayed by air pollution but not proportionately cheered up by, say, the virtual abolition of poliomyelitis. Peter Medawar
I need to be cheered up a lot. I think funny people are people who need to be cheered up. Lynda Barry