This doesnt exist. I spent 6 years with all types of engineers, applied mathemeticians, and compSci people and i gaurantee you that this isnt a thing.
Your outside appearance is a reflection of your internal processes. Your internal processes cannot simultaneously be doing linear algebra and circuit design while your outside is looking like those two rejects.
The only exception ive seen is the dishelved nutty professor look, but ive only seen this applied to those distinguished professor's who had so much energy exerted to their various papers that they literally had none left for their wardrobe.