You know, those people who are arrogant and think they know everything better than you but actually know **** but making you the idiot. How to deal with them? Insist on your position or just ignore them?
If you can give me more details, I probably can give a suggestion. Who exactly is this person? What relation is he/she to you? How many times do you see him/her? What did he/she say regularly to offend you? How do you respond?