go off on a tangent

• go off at a tangent (UK)

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go off on a tangent (third-person singular simple present goes off on a tangent, present participle going off on a tangent, simple past went off on a tangent, past participle gone off on a tangent)

1. (US) Synonym of fly off at a tangent.

• go off on one

• “go off on a tangent”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.
• “go off on a tangent”, in Cambridge English Dictionary, Cambridge, Cambridgeshire: Cambridge University Press, 1999–present.
• “go off on a tangent”, in Collins English Dictionary.
• “go off at on a tangent” (US) / “go off at on a tangent” (UK) in Macmillan English Dictionary.