"Grungus" is a word used to describe filth. It is both an adjective and a noun. Things that are dirty/filthy are "grungus" or "covered in grungus." The word is more than this: it is the embodiment of disgust and repulsion, and is typically used hyperbolically.
"Sis wtf did you cook in here, the kitchen is covered in grungus."
or
(reacting to something gross) "That shit's grungus, bro."
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.