Also found in: Medical.
To be unable to do any more repetitions of a strength-training exercise due to physical exhaustion. Man, my arms are out of shape. I repped out after just five bicep curls! You shouldn't just keep pushing yourself until you rep out, or you could end up really injuring yourself.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
in. to do too many repetitions of an exercise and reach exhaustion. After forty crunches, he repped out. He’s got some work to do.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.