I don't know what you're talking about.
3 seconds sound clip from the Old School movie soundboard.
You can hear this line at 00:40:06 in the Blu-ray version of the movie.
Quote context
[...]
- This is me leaving. This is me leaving.
- There he is. What's going on, brother?
- Nothing. Just making some copies. See you later.
- Hey, Mitch, hang on a second. I heard you guys are starting up a fraternity.
- I don't know what you're talking about.
- Right. It sounds cool, man. I want in.
- Listen to me. There is no fraternity. I don't even know what you're talking about.
- You listen to me. I need this, okay? My wife, my job, my kids. Every day is exactly the same.
- I go golfing on Sundays. I hate golf.
- Don't blackball me, Mitch. Please.
[...]