When one witnesses something so outrageous that there is no time to complete the sentence. Also used for emphasis on "fuck".
Boss: Do you see that sketchy guy covered in dust walking towards the store with surgical gloves on?
Worker: He best not be coming in

*Man walks in*

Boss: Well, I gotta go
Worker: Da fuck?!?!
by DJ Timyo Fr33flo September 18, 2011
da fuck you do that for?

da fuck you doing?
by mike b. January 6, 2005
usually used when something is so outrageous that what the fuck no longers shows how outrageous that said something is
bob- sally hunnie i cheated on yu with a prosistute and yu might have herpes

sally- DA FUCK
by yamomzonmylap February 19, 2010
commonly used when your fucking confused as shit
da fuck is yu doin nigga ?
by j stizzy November 26, 2006
Why?
He lays down a monster...da fuck did you lay that down???
by Nick D February 8, 2003
When you didn't get that fat pussy in your house
wanna do the hee hee
girl: "sure!"
*show me her pussy*
da fuck is this
by Carlos2739 February 16, 2021
as in-What Da Fuck?!
by DadA February 26, 2005