bumper = the furthest forward or furthest back part of a car, the part that bumps into other cars 保险杠 Bumper sticker has two meanings: 1. A sticker you put on the bumper of your car 2. A very large sticker (bumper = very large) 豐~ PS: Bumper may be British English for the American word "Whopper".

Thank you sooooooooo much , June Ma.

in Chinese we call it "车尾贴"，like you write to the following driver to warn him or her not be too close to you~