1) Police, CB operators', amateur radio operators', and shortwave radio listeners' shorthand for interference on radio frequencies caused by other radio stations, as opposed to QRN=noise from car ignitions, power lines, dialysis machines, atmospheric effects etc.
2) Jocularly, the QM city bus lines that run between Manhattan and Queens in New York City, because of the QRM=traffic they always encounter.
I'm trying to get one of the QRM buses to Queens so I could get home and listen to Radio New Zealand International on my shortwave radio before the QRN from Deutsche Welle pwns it.
by pentozali September 4, 2007
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