What is Heavy Weapons?
1.
totally awesome in a fantastic way.
That new car is heavy weapons.
2.
Weapons intended for mass interdiction. This includes demolition, rocket-propelled grenades, squad automatic weapons, and stationary machine guns. Basically anything big and heavy that isn't readily shoulder-fired and does massive amounts of damage.
Normally a line of T-72 tanks would have meant trouble, but to the heavy weapons specialists of Bravo team they were flyspecs.
See