look up any word, like fluffer:
 
17.
Used by small aircraft pilots to describe large aircraft that leave significant disturbances in the air around a runway after having taken off or landed
This landing may be rough, we're stacked up behind a heavy.
by Tony Rose January 10, 2006
 
1.
Something is really good
That tune is heavy
by Egg July 18, 2003
 
2.
The word "heavy" has 2 different meanings.

1) When something is unbelievable, out of the ordinary.

2) When something is good, excellent, brilliant.
"Woah!! This is heavy!!"

"This is heavy duty Doc!!"

The term "heavy" was said by Marty in all 3 Back to the Future movies.
by Callum Kennedy June 26, 2004
 
3.
"serious," NOT an indication that something is wrong with the earth's gravitaional pull in the year 1985.
Woah, Doc, this is HEAVY!
by Flux C. July 16, 2003
 
4.
A large muscular man employed to menace or intimidate, or as a nightclub bouncer. (UK slang)
The gangster was annoyed, so he sent a couple of heavies round.
by retrocool December 12, 2003
 
5.
1. (adj.) Very massive; fat; weighs a lot.

2. (adj.) Serious and intense.

3. (adj.) Hardcore, brutal, raw.

4. (noun) A tough guy.

5. (adj.) Carrying a weapon, most likely a gun.
John: Did you see that guy? He must have weighed 400 pounds?!
Jane: Yeah, I know, he was really heavy.

John: Last night, my mom died.

Steve: Man, that's heavy.

Whitechapel is heavy.

The club was having problems with riff-raff, so they hired a couple heavies to bounce.

The other side came heavy to the fight, so we beat it outta there pretty quick.
by agrainofsalt July 06, 2009
 
6.
to carry a gun or some other type of firearm
don't mess with him, he came heavy
by tommy August 12, 2003
 
7.
The grade of Scottish beer between Light and Export. Tasty.
"Mine's a pint of Heavy and some pork scratchings".
by Doggie Dogster April 02, 2006