This term relates to the feeling of complete and total relaxation one receives when playing in center field on a baseballteam. In center field, one is the farthest away from the diamond, allowing for total isolation.
Coach: What is Roger doing out there? He looks like he's meditating!
Steve: Oh, don't worry Coach. He's going under Zenterfield.
pre-coitus, a female takes an excessive amount of laxative, then mounts the partner in a standard forward facing face-sit and releases her runny stool over the partners neck to resemble a velvet collar.
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.