A-game 
(āgām′)
(āgām′)n.
The best performance a competitor is capable of in a sports contest: We'll have to bring our A-game to defeat the league champions.
[From the use of the letter A to indicate the best.]
- take the liberty
- take the mickey out of
- take the occasion
- take the piss out of
- take the plunge
- take the pulse of
- take the rap
- take the wind out of (one's) sails
- take the wind out of one's sails
- take the wind out of sails
- take time
- take to
- take to heart
- take to heels
- take to (one's) heels
- take to one's heels
- take to task
- take to the cleaners
- take to the woodshed
- take up
- take-up
- take up for
- take up the cudgels
- take up with
- take wing