have legs

have legs

To stay relevant or maintain interest. That theory really had legs—years later, most people still think that the wrong man was convicted.
See also: have, leg

have legs

If an idea, plan, or story has legs, it is likely to be successful or to continue. Blucher was confident that his concept had legs, so he pressed Cooper for a meeting. In this instance the story might not have legs.
See also: have, leg
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