Definition

The traditional definition of of word DANK as defined by dictionary.com is: "unpleasantly moist or humid; damp and, often, chilly. Common associations: Basement or cellar. However, during the 1990's the exact meaning began to change as stoners and or "potheads" began to reference it with exceptional marijuana. Over time, as this seemingly small sect of society matured, those same ethos did to progress. The definition now attributed to either a righteous craft micro-brew, a killer jam, or perhaps even a serving of finely grated cheese, assorted peppers and or hot-like sauces (garnish to taste) over a bed of salt side up "original" Triscuits wheat crackers, and prepared on high power for two minutes in a conventional microwave oven ( see Triscuit Nachos).

The adverb OVERLY often associated with excess, within some circles the term does not overwhelm but excite. When OVERLY is paired with DANK the term has come to represent greatness exceeded. As if it were a country-fried steak sandwich proceeding beyond the parameters of the bun; OVERLY DANK is both striking an pleasurable (see example).

"It was one of those beers that wasn't overly dank, but that is an incredible session beer."
-beeradvocate.com

In this case the beer talked about hear is akin to more of a Miller Lite, than a perhaps a Terrapin Rye Pale Ale; which may be a little to complex to continually comprehend, but remains quite reasonable.