I might want to seem less intelligent,possibly,you know what I mean

https://hackspirit.com/6-habits-make-people-seem-less-intelligent/

Jordan Peterson says this too:

Extract

2) Poor Posture

If you want people to take you seriously, you need to take yourself seriously. This means that you need to present yourself seriously.

So show people you are serious by adopting a posture that says you are professional and approachable.

In other words, don’t slouch.

Sure, it is fine if you are working in your basement or lazing on the couch on a Sunday afternoon, but if you are doing work, sit up straight. Even if you work at home, getting dressed and sitting at your desk makes all the difference in your approach to work, and how you see yourself in your life.

So sit up straight. Make sure your feet are planted firmly on the floor and don’t hunch over your computer.

If you are in a meeting, be sure to keep your hands in front of you so that you don’t cross your arms: this makes you look closed off and unapproachable to those around you.