It is the onomatopoeia of the sound that an automatic gun makes when it is fired.
When a man from the south catches someone trespassing on their property they will most likely fire at them with their AK-47 that goes "Ratatatatata!" and will leave court innocent because it was in self defence.
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.