Who the fuck are you, man?
4 seconds sound clip from the The Big Lebowski movie soundboard.
You can hear this line at 01:02:15 in the Blu-ray version of the movie.
Quote context
[...]
- Maude has told me all about you.
- She'll be back in a minute. Sit down.
- So, what do you do, Lebowski?
- Yeah? The friend with the cleft asshole?
- Hello.
[...]