What is tifu?

TIFU is an acronym that stands for "Today I F**ked Up." It is a popular subreddit on the social media platform Reddit where users share stories about embarrassing, funny, or unfortunate events that happened to them on a particular day. These stories often involve some sort of mistake or mishap that resulted in a negative outcome for the person telling the story. The TIFU subreddit has a large following and is known for its entertaining and relatable content.