Sloth \slawth\ or \slohth\ , noun;
1. Habitual disinclination to exertion; indolence; laziness
2. Any of several slow-moving, arboreal, tropical American edentates of the family Bradypodidae, having a long, course, grayish-brown coat often of a greenish cast caused by algae, and long, hooklike claws used in gripping tree branches while hanging or moving along in a habitual upside-down position
3. A pack or group of bears
This word dates to the 12th century as "indolence, sluggishness" from Middle English slou. Slou comes from Proto-Germanic *slæwaz and is also the forebear of slow. Slou displaced Old English slæwð, which is pronounced nearly the same way as sloth, but spawned sleuth ("sloth, laziness"). Sleuth meaning "detective" is unrelated.
Now, go look up sloth videos on YouTube. You're welcome.