Meaning

noun small spiny-finned fish of coastal or brackish waters having a large head and elongated tapering body having the ventral fins modified as a sucker

noun small slender European freshwater fish often used as bait by anglers

originThe noun is derived from Late Middle English gojoun [and other forms], from Old French gojon, goujon (“gudgeon”), from Late Latin gōbiōnem, the accusative of gōbiō, the augmentative of Latin gōbius (“gudgeon”), from Ancient Greek κωβῐός (kōbĭós, “fish of the gudgeon kind”), probably of Semitic origin. The English word is a doublet of goby and goujon. The verb is derived from the noun.

Etymology from Wiktionary, CC BY-SA 3.0