To greatly insult someone verbally (and sometimes physically) about themselves, situations they've been in, their family, friends, or anything under the sun. It is more of a competitive thing mostly used to see who can make the other person feel stupid. Types of jokes used are jokes about a person they look like, objects they look or smell like, a quote from a song, book, movie etc.. that they are relevant to, their clothing, etc. Most people use these to have a laugh, some people use it to piss the other person off (leading to fights).

There are certain words to use after every refernce such as

"Lookin ass"
"Body ass"
"Foot ass"
"Face ass"
"Back ass"
"Jaw ass"
"chin ass"
"havin ass"

or anything else having to do with the previous heat. Those are the more commonly used ones though.

Gun(s)

Heat has several meanings as a word and one as an abriviation.

Heat as a slang term is commonly used to describe a weapon of some kind, usually a pistol. "You packing heat?"

Heat as in heat generated by an exothermic reaction is an increase in energy of particles causing them to move/vibrate more rapidly, in some materials this can cause electricity to flow more easily, for materials to melt then evaporate.

When an animal "goes into heat" they are at their most sexually active and reproductive time of the year, this would usually occur during the "mating season" of the particular animal.

As a military abrieviation, HEAT means High Explosive Anti Tank. This is a rocket or other explosive missile/shell designed to penetrate through a tracked vehicles armour before detonating it's explosive charge to disable/destroy the target. (For those of you wondering, there is such a thing as "low explosive")

Unessary or Unwanted attention

a firearm

1.(n)- Ghetto slang for POLICE
2.(n)- Ghetto slang for hand-gun

Basically a gun of any type.

verb: To be in a time of highest level of reproductivity, usually used when describe animals.