brainbooster
nounUK /ˈbreɪnˌbuːstə/
US /ˈbreɪnˌbuːstər/
Something that helps your brain think better.
A good night's sleep is a great brainbooster before a test.
OTHER MEANINGS
2. A food or drink believed to improve thinking.
She drinks green tea as a brainbooster in the morning.
3. An activity that sharpens the mind.
Crossword puzzles are his favorite brainbooster.
4. A supplement marketed to improve mental performance.
He bought a brainbooster at the health store.