Modern graffiti is a rebellious art form which was especially popular in the US during the 1980's. Graffiti is usually a colorful spray painting which is rendered on the sides of buildings, bridges, handball courts, or other public structures. Also known as "writing" or "tagging", graffiti is often associated with the origins of hip-hop music and the boroughs of New York City. Because graffiti is considered by most authorities to be vandalism, its practitioners often worked quickly at night, and they signed their work with pseudonyms. Another way writers avoided prosecution was by adopting particular styles of writing which are difficult to read with an untrained eye. These styles are often so distinct that they can identify the origin of the artist. Brooklyn Style, for example, often has arrowheads at the endstrokes of letters which emerge outward from the grafitti in many directions.

The following are a list of slang terms used by writers:

Wak: substandard or incorrect
Generic: synonymous with wak
Buff: To remove graffiti
Tag: the signature part of the graffiti
Burn: to beat the competition at writing
Def: really good. (synonymous with fresh)
Rad: the best
Toy: an inexperienced writer
Bite: to copy another's style
Up: a prominent writer