bobsled

noun

1. a sled having two pairs of runners, a brake, and a steering wheel or other mechanism that enables the front rider to direct the sled down a steeply banked run or chute.
2. a sled formed of two short sleds coupled one behind the other.
3. either of the sleds thus coupled.

verb (used without object), bob·sled·ded, bob·sled·ding.

4. to ride on a bobsled.