Under the breath

with low voice; very softly.

See also: Under

References in periodicals archive ?
meanwhile, has a full line of products selling under the Breath Remedy brand name, including a tongue scraper and a breath/ tongue spray.
Concurrent with the sale, Beta Brands and Kraft entered into a broader license agreement, which will allow Beta Brands to pursue extensions to its current product line under the BREATH SAVERS and BEECH-NUT brands in Canada.