The phrase (often transliterated from Ukrainian or surzhyk as болить мене серединка-серединка ) appears to be a phonetic interpretation of a viral audio clip or folk-style expression that has gained traction on social media platforms like TikTok.

A feeling that isn't quite sadness or physical illness, but a lack of energy in one's center.

It mimics the way a child might describe an illness to a parent—unable to point to a specific organ, they simply say the "middle" hurts.