To take preemptive steps to stay out of trouble with others, especially in relationships with family members or friends, and at work with co-workers or supervisor(s). A clean version of cover your ass and similar terms.
"I am extra careful to not use profanities around my co-workers, and I am especially meticulous in being thorough with my projects at work. Since the supervisor is such a jerk, I always tell my co-workers to cover your hindquarter."
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the USCoast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
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.