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Refers to street in Houston one commonly ends up on if they are lost.

Phrase is used for when someone is experiencing temporary insanity (possibly from a caffeine overdose) and either jumps to and from multiple topics in one conversation or winds up in the middle of nowhere when driving to a destination they have been to multiple times.
Person 1: Wait, I thought we were talking about the health care plan and now you're talking about shopping for your mother's birthday present?

Person 2: Why am I on Dunlavy?
by Dunlavy December 28, 2010
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