Vulgar Definition :
1. Crudely indecent.
2.
a. Deficient in taste, delicacy, or refinement.
b. Marked by a lack of good breeding; boorish.
c. Offensively excessive in self-display or expenditure;
3. Spoken by or expressed in language spoken by the common people;
4. Of or associated with the great masses of people; common.
Vulgarism Definition :
1. Vulgarity.
2.
a. A crudely indecent word or phrase; an obscenity.
b. A word, phrase, or manner of expression used chiefly by uneducated people.