- any small marine or freshwater fish of the family Gobiidae, often having the pelvic fins united to form a suctorial disk.
- any fish of the closely related family Eleotridae, having the pelvic fins separate.
- a going by without notice; an intentional passing by; snub: to give one the go-by.
- any small spiny-finned fish of the family Gobiidae, of coastal or brackish waters, having a large head, an elongated tapering body, and the ventral fins modified as a sucker
- any other gobioid fish
- to pass
- to be guided by
- to use as a basis for forming an opinion or judgment
- a deliberate snub or slight (esp in the phrase give (a person) the go-by)