As interjections the difference between brrr and brrm
is that brrr is while brrm is (especially used by children) the sound of a car engine.
brrr
English
Derived terms
The American writer series, a place name for the imaginary little town of “Brrr”, considered to be the coldest in Moose County, fictitious subdivision probably located in Sault St. Marie Peninsula, in the northern part of Michigan State, between Lake Superior and Lake Michigan.
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brrm
English
Interjection
(
en interjection)
(especially used by children) The sound of a car engine.
See also
* vroom