1. n.1 a small European freshwater fish, Gobio gobio, often used as bait.
2 a credulous or easily fooled person.
Etymology: ME f. OF goujon f. L gobio -onis GOBY 2. n.1 any of various kinds of pivot working a wheel, bell, etc.
2 the tubular part of a hinge into which the pin fits to effect the joint.
3 a socket at the stern of a boat, into which a rudder is fitted.
4 a pin holding two blocks of stone etc. together.
Phrases and idioms:
gudgeon-pin (in an internal-combustion engine) a pin holding a piston-rod and a connecting-rod together.
Etymology: ME f. OF goujon dimin. of gouge GOUGE