English version

bumper sticker in Motor vehicles topic

From Longman Dictionary of Contemporary Englishbumper stickerˈbumper ˌsticker noun [countable]  TTCPUBLICIZE/MAKE KNOWNa small sign on the bumper of a car, with a humorous, political, or religious message
Examples from the Corpus
bumper stickerThat he ought never put a bumper sticker on a new car.Our unsolicited advice: Cut off the dreads, peel off the bumper sticker, and just stop listening to reggae entirely.