Surfer here from Australia, "heavy" is very common surfer slang used to describe something "serious" or "unpleasant". It comes from the idea of a "heavy wipe-o

Surfer here from Australia, "heavy" is very common surfer slang used to describe something "serious" or "unpleasant". It comes from the idea of a "heavy wipe-out", which can quite easily occur while surfing "waves of consequence". Generally good, hollow, barrelling waves contain more water volume and energy, when they break they look and feel "heavier" and while being better rides, have more potential to injure a surfer. The slang has indeed made it's way into everyday usages in NZ and Oz and Hawaii, I guess California also. I believe the original poster is describing a serious or unpleasant situation, which seems to be the case.