"Whisky in the Jar" is a traditional Irish folk song that has been covered by various artists, including The Trammps. The song tells a story of a highwayman or a robber who encounters Captain Farrel while counting his money on the Kilmagenny Mountains. The protagonist first threatens Captain Farrel with a pistol and a saber, demanding that he surrender his wealth. The chorus, "Wish a ring a ra do rum di, Whack fol me daddio, Whack fol me daddio, There's whisky in the jar," serves as a celebratory refrain throughout the song.

After successfully robbing Captain Farrel, the protagonist counts the money, realizing it's a handsome sum. He then decides to send it to his beloved Jenny. Despite Jenny's assurance of loyalty, the protagonist expresses a cynical view of women, blaming them for being untrustworthy and bringing trouble.

The subsequent verse describes the protagonist retreating to his chamber to rest. In his dreams, he fantasizes about wealth and luxury. However, he wakes up to find that Jenny has betrayed him by replacing his ammunition with water. This betrayal leads the protagonist to call for Captain Farrel, who seeks revenge against him.

The final verse conveys the protagonist's hope and determination to seek assistance from his brother in the army, possibly stationed in Cork or Killarney. He believes his brother would support him and they would venture together in Kilkenny. The protagonist contrasts his brother's loyalty with Jenny's unfaithfulness.

Overall, "Whisky in the Jar" combines elements of adventure, betrayal, and the search for loyalty. It portrays a protagonist who is caught in a cycle of deception and relies on whiskey as a source of comfort and escape from life's hardships.