work up a sweat(redirected from worked up a sweat)
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work up a sweat
1. Literally, to perspire due to strenuous physical activity. Ping pong is actually great exercise. You really can work up a sweat after just a few games.
2. By extension, to put forth a large amount of energy or effort into or toward a task. Often used in the negative to indicate the opposite. That test was so easy, I aced it without even working up a sweat.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.