verb: (informal) To sabotage, especially fox hunts in opposition to blood sports.
noun: (informal) A saboteur, especially of fox hunts.
noun: (UK, slang) A sabbatical officer.
noun: Initialism of scientific/science advisory board.
noun: (heraldry) Abbreviation of sable. [(countable) A small carnivorous mammal of the Old World that resembles a weasel, Martes zibellina, from cold regions in Eurasia and the North Pacific islands, valued for its dark brown fur (Wikipedia).]