rear end

rear end  {n.}
1. The back part (usually of a vehicle)
The rear end of our car was smashed when we stopped suddenly and the car behind us hit us.
- Often used like an adjective, with a hyphen.
A head-on crash is more likely to kill the passengers than a rear-end crash.
Contrast: HEAD-ON.
2. Rump; backside.
Bobby's mother was so annoyed with his teasing that she swatted his rear end.
Categories: noun

'rear end' on video