Off topic, but it seems that in Black communities, 'packing heat' refers to having a concealed weapon {usually a handgun}. See these excerpts from http://www.urbandictionary.com/define.php?term=packing+heat

The numbers appearing with definition refer to site visitors' up or down ratings of the definitions other visitors have sent in of the featured slang terms.

1.packing heat 32 up, 3 down

Having a concealed firearm for protection or to carry out violence.

"Don't come to Brick City, unless yo' packing heat."


2. packing heat 19 up, 1 down

To carry a firearm. Usually refers to the act of carrying a handgun.

Not many people know it, but sweet little old lady Smith is always packing heat.

3. packing heat 4 up, 2 down

A term referring to carrying a weapon with you. A small example is a concealed weapon, but a better one would be being heavily-armed with a machinegun.

"Daniel Pearl should've been packing heat over there. Damn customs."

-snip-

Some of the other definitions go into a whole 'nuther sexualized meaning, but I know no one here would be interested in that.

:o)