Definition of hot brick in US English:

hot brick

noun

  • 1In plural"on hot bricks": in a state of anxiety, agitation, or restlessness. Chiefly in similative phrase "like a cat on hot bricks".

  • 2In similative phrases, as "to drop (a thing or person) like a hot brick": = "hot potato".

Origin

Mid 19th century; earliest use found in Female Freemasons. From hot + brick.

Pronunciation

hot brick

/ˌhɒt ˈbrɪk/