Sentence:  DoggoLingo, sometimes referred to as doggo-speak, "seems to be quite lexical, there are a lot of distinctive words that are used," says Internet linguist Gretchen McCulloch. "It's cutesier than others, too. Doggo, woofer, pupper, pupperino, <WSD>fluffer</WSD> — those have all got an extra suffix on the end to make them cuter." 
Meaning of the word marked with <WSD> tags:  A dog.