Generally 1st definition: references to weed, but is called dank, and holy because of of the use of meme containing these words as memes,

Most people use Dank Holy Kush as a joke.
2nd definition:

Referencing To a drug most commonly weed either grown by or for a church or church official.

A catch all word to describe anything that is basic, uncool or untrendy. According to The New York Times, "cheugy (pronounced chew-gee) can be used, broadly, to describe someone who is out of date or trying too hard."

Things that are cheugy:

The New York Times
PT Cruisers
Goldendoodles

Australians

Addison Rae
White people
Billionaires

The person writing this definition