Wise up!

Wise up is a phrasal verb and expression to literally say:  "act more wisely", to make or become aware, informed, or sophisticated.
(Wise means knowledgeable, clever.)  


We use it to say: "stop being an idiot" 
Typically said in a scolding manner.
1. "I could make a million pounds with my blog" 
"Yeah, right! Wise up." 


or "act more maturely"
2. "Stop acting like a child! It's a sophisticated party and they aren't impressed so wise up."



or "become more aware or informed"
3. "I need to wise up about the dangers of eating processed foods."