Definition
A feathered dinosaur from the Ark: Survival Evolved video game that resembles an allosaurus with a snowy white coat—obscure enough that mentioning it instantly reveals your gaming credentials to the uninitiated.
Example Usage
I tried explaining what a yutyrannus was at dinner and everyone stared at me like I'd invented a fake creature.
Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=yutyrannus&defid=14619864)
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