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.
Damn, for a throw up, that shit is sweet.
by THORNE ¥ August 9, 2004
number 8 on the drunkness scale
1- slightly buzzed
2- buzzed
3- very buzzed
4- slightly drunk
5- drunk
6- very drunk
7- slammed
8- very slammed (usually throwing up)
9- passed out
10- death
I'm going to kick your ass if you make it to an 8 again and I have to clean it up!
by Kool Mint Flava September 30, 2004
The act of vomiting. The term 'throw up' is usually considered less offensive than words such as 'puke' or 'barf.'
My little sister had to throw up after she went on the roller coaster.
by Mr. X-106 December 8, 2003
The act of being of being Intoxicated by alcohol and marijuana at the same time.
"I tend to dro' puff, I'm throwed and I'm high
I guess I'm throwed up" from Friends With Money by Drake
by LurkCity January 7, 2010
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.
i. JA fucked up Saber's bitch-ass roller with throw ups.
ii.You know that kid who throws up NE, what do they write?

Throw up also called a throwie or throw.
by NEone October 30, 2004
a graffiti marking composed of a fill and outline done quickly with spray paint on a vertical surface
You that throw-up you did on the RIPTA bus was phat.
by JMello September 23, 2003