BOB n. 3 definitions
A knot of worms, or of rags, on a string, used in angling, as for eels; formerly, a worm suitable for bait. Or yellow bobs, turned up before the plow, Are chiefest baits, with cork and lead enow. Lauson.
BOBBIN n.
A spool or reel of various material and construction, with a head at one or both ends, and sometimes with a hole bored through its length by which it may be placed on a spindle or pivot. It is used to hold yarn or thread, as in spinning or warping machines, looms, sewing machines, etc.