Originally Posted by subicpilot

Always handle things in this order:
1. Try to resolve it with the offending individual. Talk.

If that doesn't work,

2. Tell your captain you are taking the matter to pro stan and go to your union professional standards rep. He should have a more formal chat with the guy. Usually this clears things up. Stress to him that you feel this is a safety issue that is not being fixed at the flight deck level. Nothing personal.

3. If you fly with him after this and he persists, then you can tell him if he doesn't knock it off, you are gonna rat on him to the CP. The professional Mr. Nice Guy approach didn't work and now you have to be a d*ck. Sometimes, some people don't respond to anything but disciplinary action. This is your last resort...even though you are in the right, you probably won't be very popular after doing this. Sometimes the right thing isn't the easy thing.

And calling in sick only dumps this problem captain on some other, possibly less assertive, first officer. You wouldn't be doing a responsible job by doing this.

Just my $00.02.