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.