[hob] n [ME hobbe, fr. Hobbe, nickname for Robert] (15c) 1 dial Eng: hobgoblin, elf
2: mischief, trouble--used with play and raise "always raising ~"
[2]hob n [origin unknown] (1511) 1: a projection at the back or side of a fireplace on which something may be kept warm
2: a cutting tool used for cutting the teeth of worm wheels or gears [3]hob vt hobbed ; hob.bing (1799) 1: to cut with a hob
2: to furnish with hobnails