smash in

smash in

1. To cause something to crush, crumple, or collapse by striking it or exerting a lot of force on it. A noun or pronoun can be used between "smash" and "in." The demolition crew smashed in the house with a wrecking ball. Stop standing on the box like that, or you'll end up smashing it in!
2. To strike or collide with someone in a particular body part with great, violent force. A noun or pronoun can be used between "smash" and "in" to indicate who is being hit. She lobbed a brick over the wall, smashing a man on the other side in the face. The boxer smashed her opponent in the ribs with a devastating left hook.
See also: smash
Farlex Dictionary of Idioms.

smash something in

to crush something inward; to make something collapse inward by striking it. Andy gave one good kick and smashed the box in. Liz smashed in the window.
See also: smash
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • roll up
  • crumple up
  • squash up
  • involve with
  • involve with (someone or something)
  • involved with
  • wad up
  • squash down
  • arrange for
  • arrange some music for