could (do something) with one arm tied behind (one's) 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!

See also: arm, back, behind, could, one, tie

Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.