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Hyperbolic, embellished, or untrue stories or statements. I know tall talk when I hear it, so there's no way Joe wrestled an alligator on his vacation. My uncle has always been full of tall talk about the time he spent overseas. I used to believe him when I was a kid, but now I've learned to just laugh along.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.