Epicly finds its origins in its root word, epic. It is an adverb and was first used on Friday, October 24, 2008 on Digg to describe what many believe is a lack of intelligence on the part of Sarah Palin as it relates to reality. Epicly generally has a negative connotation.
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.