Denebian slime devil
From Memory Alpha, the free Star Trek reference
A Denebian slime devil is a foul animal from the Deneb system.
Korax once said that James T. Kirk was a Denebian slime devil, an insult that offended Pavel Chekov. (TOS: "The Trouble with Tribbles"; DS9: "Trials and Tribble-ations")
Information about Denebian slime devils was displayed by the computer as an LCARS graphic in Keiko O'Brien's schoolroom on Deep Space 9. (DS9: "A Man Alone", "The Nagus")
The artwork used in the graphic is from the Denebian slime devil entry of the Star Fleet Medical Reference Manual published in 1977.
