The way far too many people spell "hilarious." It is definitely one of the most popular misspelled words in the english laguage. "Halarious" is how most people pronounce "Hilarious" in every day speech. This is the root of the word.
The act when a boss, or higher ranked, employer at a company shares a joke or funny tale at an attempt to amuse their workers when in realitysaid joke or tale is in fact dull and only amusing in the employers eyes. Commonly followed with a tag line: "you had to have been there". Mostly used by co-workers to point out bland senses of humor.
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.