A "thank you" given to someone for a favor or action that has not yet taken place and never ends up materializing.
You have already thanked them for something they did not really do. It is not fair and can be taken back at any moment.
Yesterday my wife said she was going to give me a message when we got home from work so I said "thanks, I really appreciate that". We got home, she ate dinner and went to bed with no message yet had already received her thanksism. I woke her up and took it back.
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.