(obsolete, thieves' cant) A man who is wild, thoughtless, whimsical, capricious or irresponsible.

plural of smooth brain

Eggcorn of rack one's brains.

Alternative form of rack one's brain

Alternative form of pick someone's brain

Alternative form of cudgel one's brain

simple past tense and past participle of rack one's brains

present participle of rack one's brains

Third-person singular simple present indicative form of rack one's brains

The migration of educated or talented people from less economically advanced areas to more economically advanced areas, especially to large cities or richer countries.