The phrasal verb "cheer up" is predominantly used in informal speech, as it conveys encouragement or attempts to lift someone's spirits in a casual, friendly manner. It is most commonly encountered in everyday conversations where individuals seek to support friends, family, or acquaintances during minor setbacks or when they appear to be feeling downhearted or discouraged. The phrase is often used as a directive, such as in "Cheer up, things will get better," or a reassurance, like "She’ll cheer up once she sees her friends." While less appropriate in formal writing, it might occasionally be used in less formal contexts such as newsletters or speeches intended to connect on a personal level with the audience. "Cheer up" is versatile and can also appear in various forms, such as “cheering up,” to describe the process of becoming happier.
B1
PreIntermediate
1. To make someone feel happier or uplifted.
I bought some flowers to cheer up my friend who's been feeling down lately.
A good joke can really cheer up a room full of people.
2. To become happier oneself.
She seemed to cheer up after she heard the good news.
He tried to cheer up by listening to his favorite music.