drop a brick

Verb

 * 1)  To commit a faux pas, especially in speech, such as by tactlessly speaking of a subject that should not be mentioned.
 * The clumsy builder dropped a brick on his toe.
 * The clumsy builder dropped a brick on his toe.
 * The clumsy builder dropped a brick on his toe.
 * The clumsy builder dropped a brick on his toe.
 * The clumsy builder dropped a brick on his toe.