Rack my brain — try very hard to remember or to solve
Brainstorm — discuss
Brainy — very intelligent
On the brain — constantly thinking about smth
Have a brainwave — suddenly think of a good idea
Be the brains behind smth = be responsible for intervening or organising smth
Brainstorm — discuss
Brainy — very intelligent
On the brain — constantly thinking about smth
Have a brainwave — suddenly think of a good idea
Be the brains behind smth = be responsible for intervening or organising smth