ain't got a grain of sense

ain't got a grain of sense

Is very foolish or lacking common sense. Jimmy almost crossed the street without looking up from his cell phone. He ain't got a grain of sense!
See also: grain, of, sense
Farlex Dictionary of Idioms.

ain't got a grain of sense

 and ain't got a lick of sense
Rur. is or are foolish. Mary spends money like there's no tomorrow. She sure ain't got a grain of sense. I wouldn't trust Jim to take care of my kids. He ain't got a lick of sense.
See also: grain, of, sense
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • ain't got a lick of sense
  • ain't got the sense God gave geese
  • be not much between the ears
  • horse sense
  • not have much between the ears
  • common
  • not know enough to come in out of the rain
  • (as) good as finished
  • finished
  • (one) would be lucky