In a video obtained by TMZ Sports, McGregor is seen punching an elderly man for what many are seeing as his refusal to take a shot whiskey.
The disgusting incident took place at The Marble Arch Pub in Dublin, Ireland back on April 6th of this year, and showed McGregor lining up shots of his Proper Twelve whiskey for everyone.
However, things escalated when the man refused the shot, and refused two cups that McGregor placed in front of him.
While it is unclear what was said between McGregor and the elderly man, it led to McGregor delivering a quick punch to the guys face before being restrained and pulled out of the bar.
The elderly man seemed to take the punch in stride, absorbing the shot when struck by McGregor.
Police opened an investigation, but it is not known if that investigation is still open, or is McGregor was even charged as a result.
This isn’t the first violent incident that McGregor has been involved in, and seems to always find himself in situations such as these, and usually in the wrong.