under your breath

under (one's) breath

Spoken in such a soft, quiet voice that others cannot hear it distinctly. "You'll get what's coming to you one of these days," Janet muttered under her breath.
See also: breath
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

under your breath

in a very quiet voice; almost inaudibly.
See also: breath
Farlex Partner Idioms Dictionary © Farlex 2017

under your ˈbreath

in a whisper (= a low voice), so that others cannot hear: He muttered something under his breath. OPPOSITE: out loud
See also: breath
Farlex Partner Idioms Dictionary © Farlex 2017
See also: