Throw ups are a type of tag, which in turn is a form of ad-hoc, quick graffiti.

Throw ups are often only one or two colors, and are a very unembellished symbol, letter, abbreviation, or short word.

Taggers (people who tag) often throw up a tag like this everywhere they go.

a spanish word meaning the flipflop
used by latin moms to beat their child's ass

The act of vomiting. The term 'throw up' is usually considered less offensive than words such as 'puke' or 'barf.'

A throw up is a quick graffiti bomb. Usually not the writer's full name. An Unfilled throwie is a hollow. If a throwie is filled its usually a crack-fill(quick back and forth strokes with fill colour).

The term throw up comes from the fact that the bomb is just thrown up on a wall, bus, train, etc very quickly.

A simple outline with a 1 layer paint fill-in. usually done in the initials of your name.

a quick freestyle graffiti bomb

a graffiti marking composed of a fill and outline done quickly with spray paint on a vertical surface