sulky
Cross references:
1. sullen
1. sulky \'s*l-ke-\ aj [prob. alter. of obs. sulke (sluggish)] 1: sulking
or given to spells of sulking 2: having wheels and usu. a seat for the
driver {~ plow}
2. sulky n [prob. fr. 1sulky] : a light 2-wheeled vehicle having a seat for
the driver only and usu. no body
Webster's English Dictionary