The man was caught with his pants down in the Thai island of Phi Phi as angry local shopkeepers filmed on their phones and confronted the drunken pair.
Yesterday the shameless lad surrendered to police and they were both forced to beg for mercy.
The clip, which went viral earlier this week, shows the girl on her knees in front of the man.
A local then angrily shouts: ““What are you doing here, why you f***ing outside here?”
The slurring Irish lad, wearing khaki shorts and a blue shirt, responds quietly: “I apologise”.
The girl, wearing a white bikini, tells the man she is American before the Irish lothario grabs her hand and leads her away.
The shopkeepers yell after them that they have called the police.
The footage was also shown on television in Thailand as cops appealed for information.
A member of the Krabi tourist police today said: “The two said they were drunk at the time of the incident, and that after they were confronted by locals they stopped. The man later left for Koh Tao, while the woman returned to Chiang Mai”
According to the Phuket Gazette, the 21-year-old American girl and the 24-year-old Irishman were charged for public nudity and acting inappropriately in public.
The two were slapped with 2,000 baht (£44) fine each.