Technically no, but people are really confused with terminology around electric bikes of all sorts. Fatbikes are just a bicycle with oversized tires. When we look at mountainbike tires, they typically stop at around 2.6, maybe 2.8 inches in width. Fatbikes are more around 3.8 or even more, and are typically intended for snowy areas, or if you just want the extra cushioning off road. What people nowadays cry about and describe as “fatbike” is more of an electric moped.