could (do something) with one arm tied behind (one's) back
(redirected from could with one arm tied behind back)could (do something) with one arm tied behind (one's) back
Is or would be able to do something easily. I'm a professional musician, so that song is hardly a challenge—I could play it with one arm tied behind my back!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.