I just quit a job after two months - what do I say in interviews?

It's not as serious as it seems. What matters is that you have an honest and brief explanation: if the environment wasn't what you expected, if there was an issue with the role, or if it just wasn't the right fit, say it without complaints or drama. In the interview, focus on what you learned in those two months and what you're looking for differently this time - that way you show you've thought through why it didn't work out and that you're not just bailing without reason.