ぺったん

adverb taking the 'to' particle

flattening; pressing flat

Mimetic adverb describing the action of pressing or flattening something with a soft, sticky sound or motion. Often used with する or と.

• 餅もちをぺったんとつく。

  Pound the mochi with a flattening motion.

• シールをぺったんと貼はる。

  Stick the sticker on with a pat.