It is the name of one of the new songs from Farruco. The word in Puerto Rico, means vain, proud. A person who likes to boast of all and that tries to humiliate others. Farolo, fantoche, believed, person who boasts much.
In Venezuela GUILLAO is: hidden, care.
In voice low
be wrong head
A LOW VOICE
A person full of pride, is believed to be better, or are using a performance that is not. It is also used to say that something is cool, very good or nice. ( eg: your cart this guillao - pasadia yesterday was guillao )