Moxie

Moxie \MOK-see\ , noun;
1. Vigor; verve; pep
2. Courage and aggressiveness
3. Skill; know-how

Moxie was originally the name of an American soft drink. It was first manufactured in 1884 and its formula comes from a patent medicine that was advertised to "build up your nerve." It was among the first mass-produced soft drinks in the United States and it is still sold in some areas (mostly New England). Its flavor is described as a 'delicious blend of bitter and sweet.'  The use of moxie as a noun is first attested in 1908.

Today's word and the first definition were both taken from Dictionary.com's 'Word of the Day' for Saturday, August 6
Etymologies come from the Oxford English Dictionary and/or Etymonline.com