On Twitter, short for "mutual follower," that is, a follower that two or more users have in common. (Plural: mufos)

legend has it this name was once a nickname for a great man but now many people have forgotten what it stands for.
But itelligence tells me a "mufo" can be:

Any male that is always right, funny and is often mistaken for a god. This things are also there only downside. Often pet named as:

Moof
Mufie
Mufadoodle
and Mufifi

Homeboy real n-ggan homie