ガツン

noun

klop; klunk; whonk; crash; thump

Onomatopoeic noun for a heavy, dull impact sound, like a thud or crash.

• ガツンという音おとがして、車くるまが壁かべにぶつかった。

  There was a thump, and the car hit the wall.

adverb taking the 'to' particle

with a heavy impact; forcibly

Adverbial use with と, describing an action done forcefully or with a heavy impact.

See also: がつんと言う

• 彼かれは机つくえをガツンと叩たたいた。