From WordNet (r) 3.0 (2006):
hob
n 1: (folklore) a small grotesque supernatural creature that
makes trouble for human beings [syn: goblin, hob,
hobgoblin]
2: (folklore) fairies that are somewhat mischievous [syn: elf,
hob, gremlin, pixie, pixy, brownie, imp]
3: a hard steel edge tool used to cut gears
4: a shelf beside an open fire where something can be kept warm
v 1: cut with a hob