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.

the whale tail is the shape formed when a g-string rides up high over a womans trousers

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