tfyo 

the fuck you on. Used when a friend says something stupid.

“hey man, wanna go hang out with your ex?”

“tfyo hell no”

tfyo by bacongoalie August 17, 2021

TFYOB 

"The fuck you on 'bout?". Typically used by people who say "bout" and not "about".

Luke: I heard you liked Katie.
Max: No, I don't, I said I liked Ashlyn. TFYOB?

TFYOB by Saryniae May 21, 2023