1972 I. Anderson (transcribed from song, perf. ‘Jethro Tull’) Your wise men don't know how it feels To be thick as a brick.
1982 ‘J. Gash’ (1985) i. 10 Even his eleven motor-cars can't prove he's not thick as a brick.
2005 M. Atwood xi. 77 The man was thick as a brick and had the manners of a stump.