What does TIFU mean?

Other definitions of TIFU:
- Today I "fudged" up. This acronym was popularized on reddit.
- Tifu may also be a martial art that nobody's heard of.
All of our slang term and phrase definitions are made possible by our wonderful visitors. If you know of another definition of TIFU that should be included here, please let us know.
How to use the term
TIFU:
tifu by accidentally telling my menstruating wife that she was "under the influence"
tifu by coming to work hung-over
tifu by forgetting to set the parking brake when I parked on a hill
Video related to TIFU
References:
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