Noun, origin unknown. Someone who exhibits infantilistic and furry tendencies or humans who see themselves as baby animals. Often seen in diapers and may possess several pacifiers and baby bottles. Some sleep in large cribs. Related to furry and infantilism.
"Hey. Check out that raccoon in a diaper. He must be one of those babyfurs."
Like normal furries (or, more accurately, normal furries who dress in fursuits for sexual purposes, since most furries are just people who like art featuring anthropomorphic animals), babyfurs get sexual gratification from wearing a fursuit. Unlike normal furries, they also get sexual gratification from wearing diapers, watching Teletubbies, et cetera.
A typical babyfur likes to act like or dress as a baby anthropomorphic animal.