Bobsled

Bob·sled

Bobsled

n.
  1. A short sled, mostly used as one of a pair connected by a reach or coupling; also, the compound sled so formed. [U. S.]
    The long wagon body set on bobsleds.
    — W. D. Howells.
  2. a long racing sled (for 2 or more people), having two pairs of runners, with the front pair connected to a steering mechanism. They are usually raced one at a time down a steeply sloping path or specially constructed chute, with sharp banked curves, and attain high speeds.