I think what you are searching for is a "Froglok Traitors Tongue", drops from a Froglok Traitor (but not every time); Froglok Traitor should spawn in Innothule Swamp at -585, -555; have seen him several times near the Gukta entrance.
Edit: Should be lore item, magic item, no drop
Edited, Tue Sep 28 11:32:25 2004