Well, that might be a fractured ulna.

2 seconds sound clip from the Caddyshack (1980) movie soundboard.

You can hear this line at 01:26:08.466 in the Blu-ray version of the movie.

Quote context

[...]

- Why'd I double it? I tell you, I should have stayed home and played with myself.

- Ty, I saw Smails before. He was cheating.

- Nobody likes a tattletale, Danny. Except, of course, me.

- Ow. Oh, my arm. It's broken!

- Good Lord what has this buffoon done now? Let's have a look at that.

- Well, that might be a fractured ulna.

- I'm afraid you forfeit.

- Who says so? The match is a draw.

- No, you don't, Czervik. You don't play, you lose. Right, Lou?

- That's right, Your Honor. Unless you wanna allow him a substitute.

- Eh? Oh, well Spaulding can play out his holes.

- Actually, judge, I think it's up to us to pick our substitute.

- What do you want?

[...]