What is the meaning of Vulgo?

In the vernacular; commonly known as.

The masses.

the common people, the masses

vulgo; commonly known as

to broadcast; to publish; to divulge; to issue; to make known among the people

to make common; to prostitute

to make known to all by words; to spread abroad; to publish; to divulge

to cheapen; to degrade

generally, usually

universally

publicly, commonly, popularly

dative/ablative singular of vulgus

the common people; the masses

introduces a colloquial synonym, or a nickname; informally or commonly known as

the common people, the masses

commonly known as

vulgar; of bad taste

Source: wiktionary.org