Heat- Someone who looks like they are on drugs, do drugs regularly, or sell drugs. Someone is only heat if you can tell they are on/do/sell drugs just by looking at them without any other information (i.e. knowing they are on/do/sell drugs regularly beforehand).

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.