Yamato and Takeo are discussing why their friend Suna is acting strange lately
and Yamato suggests that Suna may be lonely.

I heard this expression a lot lately and was wondering what it could mean.

[![enter image description
here](https://i.stack.imgur.com/SFowv.jpg)](https://i.stack.imgur.com/SFowv.jpg)

[![enter image description
here](https://i.stack.imgur.com/NcsYT.jpg)](https://i.stack.imgur.com/NcsYT.jpg)
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2021-05-21T21:08:11.523
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question
grammar meaning colloquial-language anime
what's the meaning of だもん