Fulano (en. So and so)

/fuˈlano/

Slang Meanings

Despicable or unreliable person.
Don't trust so-and-so; he's always making things up.
No te fíes de fulano, siempre está inventando cosas.
Someone trying to stand out in a group without merits.
That guy only talks about himself.
Ese fulano solo habla de sí mismo.