Toad
A toad was an amphibious creature. Its name could also have insulting connotations. 

In 2268, Stella called Harry Mudd a miserable, conniving toad. ()

In 2366, Lwaxana Troi called DaiMon Tog "a toad-faced troll". () 

In 2369,  referred to Quark as an obsequious toad. ()

In 2370, Kira Nerys said, "That little toad [Quark] is this far from doing a 360 out an airlock!" after he complained to her about Varani's music causing him to lose profits. ()

In the mirror universe that year, Kira told  that "a Ferengi toad named " was the only caring person she had met on . ()

In 2371, having merged with Curzon Dax, Odo planned to give "that little toad [Quark] the scare of his life", and did. ()

In 2372, when speaking to Jadzia Dax, Kor called Quark a toad-faced Ferengi. ()

In 2373,  described her lover of four billion years Q as a "two-timing toad" when he vanished into the Q Continuum with Kathryn Janeway. ()

See also 
 Gorokian midwife toad

External link 
 

Animals
Insults