1. Having an ample amount of time (to do something or be somewhere); not at all busy or rushed. We can do the interview now, if you prefer. I'm not in a rush. I'm not in any rush, so I don't mind if you go first.

2. Not particularly eager, willing, or desiring. Usually followed by "to (do something)." Please make sure the accounts are completely in order. I'm not in a rush to have the IRS do an audit on us right now. I don't mind staying home with the kids. I'm not really in any rush to go to the gym tonight, if I'm honest.