do something with one hand behind your back

with one hand tied behind (one's) back

Easily or effortlessly; encountering no difficulty or resistance (while doing something). I'm a professional musician, so that song is hardly a challenge—I could play it with one hand tied behind my back! Are you kidding? Montgomery is a powerhouse boxer. He'd knock that kid out with both hands tied behind his back!
See also: back, behind, hand, one, tie
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

do something with one hand (tied) behind your back

do something easily.
See also: back, behind, hand, one, something
Farlex Partner Idioms Dictionary © Farlex 2017
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