Leo Morton: Ed, can you take that Delta?
Ed Clabes: No, I can't take the Delta, my airspace is finite.
Barry Plotkin: Uh-oh, Ed's going down the drain.
Ed Clabes: I am not going down the drain.
Barry Plotkin: Oh yes you are. It happens every time you use the term "finite."
Nick Falzone: To hold on to sanity too tight is insane.
Russell Bell: I used to bowl, when I was an alcoholic.
Russell Bell: If you ever want to sleep at night, don't marry a beautiful girl.
Tina Leary: Hangin' left today, Ed?
Mary Bell: Mr. Falzone, what's the fewest number of words you can use to get out that door?
Russell Bell: Thought is the enemy.
Nick Falzone: I know. I've been thinking too much. I had that thought actually.
Answer: In the film, it's a phrase used to describe the job of an air traffic controller. They're responsible for maneuvering the airplanes around in the skies. "Tin" refers to the airplanes and they're moving, or "pushing", them around. I tried to find if this was a real reference or phrase used in air traffic controllers prior to 1999, or just made up for the movie. It seems it's a phrase made up for the movie (but I can't say for certain as I have no experience in that field).
Bishop73