It's self-deprecating joke. 😁 🪃🪃🪃

https://latelyjapanese.com/slang/20210819/meaning-of-omaiu%E3%81%8A%E3%81%BE%E3%81%84%E3%81%86-boomerang%E3%83%96%E3%83%BC%E3%83%A1%E3%83%A9%E3%83%B3/

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Ah, now I get it.

In English, it's "Look who's talking ..."