From Longman Dictionary of Contemporary Englishbe heavy on somethingbe heavy on somethinginformalTOO/TOO MUCH to use a lot or too much of something The car’s rather heavy on oil. → heavy
Examples from the Corpus
be heavy on something• The car's pretty heavy on oil.• Casualties were heavy on both sides.• Research shows that 73 percent of the console players are boys, so most of the new games are heavy on fighting.• The menu is heavy on meat and potatoes, with just a few token turkey, chicken and fish entrees.• Galleries in London, is heavy on the traditional, both in artwork and decorating.• They may not be contributory - but the odds are heavy on their being present. 