not the sharpest knife in the drawer

not the sharpest knife in the drawer

Not intelligent; dim-witted or prone to stupidity. His new boyfriend isn't the sharpest knife in the drawer, but he's pretty good looking! I wasn't the sharpest knife in the drawer in school, but I still managed to find a profession I loved.
See also: drawer, knife, not, sharp
Farlex Dictionary of Idioms.

not the sharpest knife in the ˈdrawer

(also not the sharpest tool in the ˈbox) (humorous) not intelligent: I know he’s good-looking, but he’s not exactly the sharpest knife in the drawer, is he? OPPOSITE: a/one smart cookie
See also: drawer, knife, not, sharp
Farlex Partner Idioms Dictionary
See also:
  • not the sharpest tool in the shed
  • not the sharpest pencil in the cup
  • not the sharpest tool in the box
  • smurfbrain
  • airbrain
  • airhead
  • couldn't find (one's) way out of a paper bag
  • out of a paper bag
  • (one's) way out of a paper bag
  • have a thick head
References in periodicals archive
Rambling JA opines: "What if some celebrity comes along, who is not the sharpest knife in the drawer, but has the charisma, and people like what they sound off about, but they don''t understand the needs of the city, or have the specialist knowledge they need?
Cllr Anderson said: "What if some celebrity comes along who is not the sharpest knife in the drawer, but has the charisma and people like what they sound off about, but they don't understand the needs of the city or have specialist knowledge they need?
Not bad for a cheekie chappie who freely admits that he was, as a schoolboy in Essex, not the sharpest knife in the drawer.