Definition of (as) thick as a brick in English:

(as) thick as a brick

phrase

  • Very stupid.

    ‘her employers must see that she is perceived as being as thick as a brick’
    stupid, unintelligent, ignorant, dense, brainless, mindless, foolish, dull-witted, dull, slow-witted, witless, doltish, slow, dunce-like, simple-minded, empty-headed, vacuous, vapid, half-witted, idiotic, moronic, imbecilic
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