"Whiskey in the Jar" is an Irish traditional song set in the southern mountains of Ireland, often with specific mention of counties Cork and Kerry. The song, about a rapparee (highwayman) who is betrayed by his wife or lover, is one of the most widely performed traditional Irish songs and has been recorded by numerous artists since the 1950s.

A highwayman was a robber who stole from travellers. This type of thief usually travelled and robbed by horse as compared to a footpad who travelled and robbed on foot; mounted highwaymen were widely considered to be socially superior to footpads. Such criminals operated until the mid- or late 19th century. Highwaywomen, such as Katherine Ferrers, were said to also exist, often dressing as men, especially in fiction.