Matty Healy‘s throwing some low-key shade at Taylor Swift, seemingly calling her out for everything she writes about … and, our “TMZ Live” team is here to read through the lines.

Healy gave an interview during which he said he has no interest in writing about relationships … clearly referring to their short-lived romance last year after Taylor and Joe Alwyn split.

Plus, T-Swift’s known for writing about all of her past romances … including Matty Healy, who many believe is the subject of the song “The Smallest Man Who Ever Lived” — no wonder he’s throwing shade.

But, seems Matty got the last laugh here … ’cause our guys say he used one word that’s gotta cut like a knife. Watch the full clip to hear which one.

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