When a Honda vehicle slowly rolls into the back of a stopped or slowing vehicle (most commonly a Tesla, but can be any vehicle, including another Honda), usually at a
traffic light or stop sign. This term was
originally coined by the Wham Baam Teslacam channel on YouTube, but it has since been adopted into common usage as more and more people become familiar with this
phenomenon.
Not every collision involving a Honda is a hondabump, only when a Honda rolls into the back of another car. T-bone or head-on collisions involving Hondas are never considered hondabumps, for example.