YOU SAID:

the imoji was bored of smiling all day.

INTO JAPANESE

そのイモジは一日中笑顔に飽きていた。

BACK INTO ENGLISH

The Imoji was tired of smiling all day.

INTO JAPANESE

絵文字は一日中笑うのに疲れていました。

BACK INTO ENGLISH

Emojis were tired of laughing all day.

INTO JAPANESE

絵文字は一日中笑うのにうんざりしていました。

BACK INTO ENGLISH

Emojis were tired of laughing all day.