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, publish, divulge, issue, make known among the people

to make common, prostitute

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

to cheapen, 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