i Register
In some senses, bluetongue is marked as colloquial. Watch for register when choosing this word.
noun
A disease of ruminants, caused by Bluetongue virus of the genus Orbivirus, carried by mosquitos, midges etc.
The blue-tongue lizard.
“I don't worry about snakes, blue-tongues, spiders. All I worry about is the mutton-bird.”
Someone who is as sleepy as a lizard; a lazy person.