Sleeping outside in the backcountry without an overhead shelter (such as a tent or tarp), usually done in the context of backpacking. The decision to cowboy camp is a calculated one - bugs, rain, snow, etc. are all possible backfires to the decision and can damper the experience.
Note that having an adequate shelter is a must, cowboy camping is the decision to forgo setting up a dedicated shelter and betting that conditions will be such that the shelter is not needed (but the dedicated shelter is still present/available should it be needed). Not bringing adequate shelter with you into the backcountry is foolish and can result in injury or death.
Last night we went cowboy camping at Panther Gap and the stars were ridiculous.
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.