knock (something)

knock (something)

To judge or criticize something. Hey, pickles and ice cream are pretty good together—don't knock it!
See also: knock
Farlex Dictionary of Idioms.

knock

tv. to criticize someone or something. Don’t knock it if you haven’t tried it.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions

knock

/throw for a loop
Slang To surprise tremendously; astonish.
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • knock
  • don't knock it
  • knock about with (one)
  • knock (someone) down with a feather, to
  • bang/knock your/their heads together
  • don't knock it till you try it
  • don't knock it till you've try it
  • allow (one) up
  • allow up
  • knock someone dead