The Zach Effect 

The Zach Effect, also simply called Zach Effect is referring to when a guy gets a haircut, and because of that, looks younger. This often only applies to guys who had noticeably longer hair before their haircut. This is sometimes because the guy had short hair when they were younger, and has just got it back, but the effect can happen otherwise as well.

"Did you see Max's new haircut?"
"Yeah, dude. That's the Zach effect at work."

The Zach Effect by barf flavored soda January 21, 2023

the zach ryan effect 

when you meet someone and they immediately develop something in the back of their mind that thinks you are hot. they will also never forget about you this way

oh yeah i met zach ryan the other day and now the zach ryan effect is taking over my head

the zach ryan effect by zacherthehacker March 13, 2022