The moment at birth, examining a family photo, or just at random when you realize your offspring look nothing like the silicone bag bearing, botox injected, liposucked, rhinoplasted, forehead lifted, and tummy tucked person you call your wife. When you realize you've been duped and that your wife hasn't fully revealed the quantity of plastic surgery she's had done. This epiphany may also be triggered by a family photo causing you to suddenly understand why your wife looks as if she just stepped out of Vogue compared to the more homely qualities of your children.
Jim (watching wife give birth in operating room)...Hey what the f***. That's not my child!
Doctor: Oh yes it is! It's just another case of DNA WhatTheHey! Happens all the time.
It means What The How
When you are really confused about something and want to show everyone how confused you are
Alex: "Do you remember when I told you that my dog ate my mon and his leg fell off and he stank like my grandma?"
Max:"Whatthehow is that supposed to work? Are you stupid?"
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.