Coordinate term: ass (see ass § Usage notes)

His shoes were covered with mud, and he was looking very rough and touzled; but then he had never been a very smart man, the Badger, at the best of times.

exhilaration

One Dobson, a lighterman, undertook, for a wager of five guineas, to swim on his back from Westminster bridge to Putney bridge in an hour and three quarters, without turning himself in the water; which he performed 19 minutes within the time.