1 definition by Callum Kennedy

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

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