しゃあしゃあ

adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'

shamelessly; brazenly; coolly

Describes acting without shame or embarrassment, often in a situation where one should feel guilty or awkward. Can also imply a calm, unflustered demeanor.

• 彼かれは遅ち刻こくしても、しゃあしゃあとしている。

  Even when he's late, he acts completely shameless.

• 嘘うそをついても、しゃあしゃあと笑わらっていた。

  Even after lying, he was smiling brazenly.

adverb, adverb taking the 'to' particle

fast flowing (of water)

Describes water flowing swiftly and smoothly, often with a sense of ease or lack of obstruction. Less common than the shamelessness sense.

• 川かわの水みずがしゃあしゃあと流ながれている。

  The river water is flowing swiftly.