| Idiom | Meaning | Example | 
| up and coming | 
starting to develop ability, showing potential
 | 
Lisel has won six junior trophies. She's an up-and-coming athlete.
 | 
| up and running | 
operating, working
 | 
Andre is repairing the copier. It will soon be up and running.
 | 
| up for grabs | 
available, can be bought
 | 
The estate will be sold by auction. Even the antiques are up for grabs.
 | 
| up for it | 
ready, prepared to play, pumped
 | 
Tonight's game is important. Every player has to be up for it.
 | 
| up for sale | 
advertised for sale, on the market
 | 
The Wongs must be moving. Their house is up for sale.
 | 
| up front | 
at the beginning, level with  beforehand
 | 
He was up front with me. He told me about the interest charges first.
 | 
| up in arms | 
angry, ready to fight, hot
 | 
The smokers are up in arms about the no-smoking bylaw.
 | 
| up in smoke | 
burned, destroyed by fire
 | 
The barn went up in smoke before the fire truck arrived.
 | 
| up in the air | 
not decided, not settled
 | 
They aren't sure who killed the President. It's still up in the air.
 | 
| up on | 
aware of, informed about, on top of
 | 
Are you up on the latest computer games? Have you played UFOX?
 |