Do not forget you were once ignorant of all you know now. Be patient of anyone who hasn’t had the education you have. Speak at the level of the person you are with - it’s not playing dumb, it’s being considerate. There’s no reason to make them feel uncomfortable. Plus then when someone starts going off about their superior IQ, you can cut them to pieces and watch their face when you do.
The worse you look, the more likely you are to run into someone you know so instead of feeling awkward, learn to be confident in sweats while talking to your friends.