Troll
A troll was a mythical being with supernatural powers found in the mythology of various cultures, including Earth. Its name could also have insulting connotations. 

In 2366, Lwaxana Troi called DaiMon Tog "a toad-faced troll" during the Trade Agreements Conference after his repeated advances towards her and an offer to purchase her. ()

In 2369, Q called Quark a "disgusting little troll" after making him disappear when he attempted to meet Vash in her quarters. ()

Later that year Lwaxana, believing Quark had stolen her latinum hair brooch, called him a "little troll". ()

In 2370, Kira Nerys referred to the Ferengi as trolls during a discussion with Jadzia Dax. ()

That same year, Tumak described Nog as a "big-eared troll". ()

Not long after, Kira referred to Quark as "the little troll who runs the dabo tables" when speaking to Vedek Bareil Antos. ()

In 2375, Intendant  called Quark and Rom "two little trolls". ()

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Mythological figures
Insults