Acronym for "Totally Fucking Full Out". It means doing something with beyond conceivable level of commitment and motivation. "Full-out" is a common term used in performing art to describe performing without holding anything back. TFO
and TFFO are acronyms commonly used in the urban dance community (originating from Vancouver, Canada) to express someone is dancing beyond 100%. (full-out<TFO<TFFO)
Ken: Wow, your performance was craaaaazy!
Shauna: Thanks. Yea I really went full out.
Ken: No way, that was wayyyy beyond full out. That was TFFO!!!