704 

Hell.

BOY1: "Hey where do you live?"
BOY2: "Oh, the 704!"
BOY1: "I'm so sorry for you."

704 by Ihavenoname, ho April 12, 2009

704 

704 is used as if u were in a gang like the surenos x3 gang which is loosely apart of the Mexican mafia many people use 704 in there usernames to show their adoption of the gang

Username:Carlos.704
Username:killerjohn.704

704 by Deigorivera99 September 1, 2018

704 

Kris 4 Sho

"whats it going to be?"
'704'
"rep kris"

704 by Kasper March 6, 2004

NFPA 704 

NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response, or NFPA 704 for short is the fire diamond things. They are typically placed on a door or a container and it gives warnings about what is inside of the container or behind the door. There are three colors and they each have a number 0 through 4 (0 being not present and 4 being extremely).

Red indicates flammability/combustibility (A material with a 4 will likely combust under normal atmospheric temperatures/pressures) (Propane has a flammability rating of 4) .

Blue indicates health hazards (a material with a 4 can cause death or serious harm upon exposure). (Hydrogen cyanide has a health rating of 4).

Yellow indicates reactivity/stability (a material with a 4 can detonate under normal temperatures) (nitroglycerin has a reactivity rating of 4)

The white section doesn't have a number and instead serves as a place for special warnings.
Examples of which include but are not limited to:

OX: indicates the substance is an oxidizer

SA: indicates the substance is a asphyxiant gas

BIO: indicates the substance carries a biological hazard (used for things such as viruses)
RA/RAD: indicates the substance is radioactive
ACID/ALK: indicates the substance is Acid or Alkaline respectively

A: Bro wtf is in this container?
B: Don't open it! the NFPA 704 says it's a health hazard
A: Fuckin nerd

NFPA 704 by Person12350 April 22, 2022

NFPA 704 

NFPA 704 is the official name for Fire Diamonds, which are rhombus-shaped sign that has 4 different colored squares that tell you how dangerous a substance is in four ways: Health (Blue), Reactivity (Yellow), Flammability (Red) and the white square is for Miscellaneous hazards. Each colored square is marked with a number ranging between zero and four. Zero/Empty means that that substance has no danger in that category. 1 = mildly hazardous, 2 = hazardous, 3 = extremely hazardous, and 4 = Lethal.

Hey, did you know that NFPA 704 are also called fire diamonds, saftey squares and figmenty pigmenty crosser tossers?

NFPA 704 by Jqoi Zunderlat March 4, 2021

KingGregory 704 

A King that goes by Gregory who lives in 704, the Queen City

Boy: Who is that?
A Queen: That KingGregory, always representing 704 aka KingGregory 704
Boy: Tryna get like him

KingGregory 704 by TheeKingoftheQueenCity April 17, 2022

budgetz-704

budgetz

budgetz-704

budgetz-704 by budgetz June 5, 2026