yacker tracker
n.— «The yak-o-meter is an interesting device. It has a siren and a blinking light. When the noise level reaches above 80 decibels, this yak-o-meter makes a sound. But instead of calling it by its correct name, the kids refer to it as the “yacker tracker.”» —“School Monitors Decibel Levels” KIFI-TV (Idaho) Feb. 3, 2005. (source: Double-Tongued Dictionary)
Further reading
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