smokee__e__
Smoke eaters, for obvious reasons.
The name of the movie is the "World trade center."
Firefighters are just people, so they have ordinary names - here are a couple of good links to show you how to name your characters.
The slang term for a cowboy is "HICK"
no other name
What was the name and location of the firefighters bar in the movie backdraft
The collective noun is a company of firemen (firefighters).
There is no standard collective noun for firefighters, in which case a noun that suits the situation can be used; for example a crew of firefighters, a squadron of firefighters, a team of firefighters, etc.
Snow is a slang name for the drug cocaine
Speed IS a slang name. It means amphetamines. Click the related question to find more slang.
This is not slang. The Limberlost is a swamp in Indiana. It's just the name of the landform, not a slang term.