giant tortoise
Noun
Meaning
very large tortoises of the Galapagos and Seychelles islands
Source: WordNetHypernyms
Examples
What you have told us is rubbish. The world is really a flat plate supported on the back of a giant tortoise.
Nice plan. Take the gullible outsiders, walk them around for a bit, then feed them to the giant tortoise.
“But your profile picture is of you straddling a giant tortoise!
"George is named in homage to gorgeous Lonesome George, the giant tortoise from the Galapagos Islands that died not so long ago -- and was the last of his species.