Definitions
There are 2 meanings of the phrase
Smarten Up.
Smarten Up - as a verb
Example Sentences
"You need to smarten up and study harder if you want to improve your grades."
"I told him to smarten up and start taking his responsibilities seriously."
"If you want to get promoted, you should smarten up your appearance and dress more professionally."
"The coach warned the team to smarten up their game or face the consequences."
"She decided to smarten up her resume by adding more relevant work experience."