turning a hair, not/without

without turning a hair

Without becoming upset, afraid, or emotional; with a perfectly calm demeanor. My father was a tough man. When our family dog came down with rabies, he took him out back and shot him without turning a hair. Claire, without turning a hair, knocked out the two assailants with her bare hands!
See also: hair, turning, without
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

turning a hair, not/without

Showing no sign of agitation or distress; quite unruffled and unafraid. This expression comes from horse-racing, where a horse that is extremely sweaty shows it in the roughening of its hair. It was transferred, but only in the negative, to human sangfroid in the late nineteenth century. Still referring to its origin, Richard D. Blackmore wrote (Dariel, 1897), “She never turned a hair—as the sporting people say.”
See also: not, turning, without
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer
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