Interpenetration 

Apparently it's when parts of geometry appear to be clipping through other parts.

Mostly on games.

Timmy: Hey look, that door just went through that chair when i opened it!
Tod: Ahh, thats just good old Interpenetration son, get used to it.

Interpenetration by [Cyanide] September 12, 2004

interfenestration 

The space between two windows.

The interfenestration was two inches/three meters/a mile/pi radians.

interfenestration by echjman May 30, 2005

Intergenerational Magic 

The experience one has when positively interacting with another human of a different generation. It's a feeling inside you that breaks down all existing stereotypes you have of that particular generation and makes you reconsider future generational shaming and blaming.

The Boomer experienced 'Intergenerational Magic' with the millennial employee

Intergenerational Magic by the WIN/WIN October 28, 2019

Intergenerational dissonance

Nonsense, a word used to appear more intelligent.

Danny G's Intergenerational dissonance really threw me on a wild goose chase.

Intergenerational dissonance by chick din January 30, 2018

Intergenerational addiction

Something that affects 50 % or so of health care providers and police.

That guy suffers from intergenerational addiction, his grandma's a cook his grandfather is still enthused by flight and was addicted to airshows, addiction to nuclear weapons

Intergenerational addiction by Cody5050 November 8, 2020

Intergenerational Amnesia 

The tendency of new generations of people to forget about past historical events due to said events not happening in their lifetime and no longer existing in living memory.

Intergenerational amnesia is the reason human beings fail to learn from history and repeat the same mistakes over and over again.

Olivia doesnt know who Hitler was? She's got a serious case of intergenerational amnesia!

Intergenerational Amnesia by The Osseophile February 18, 2021

intergenerational trauma 

An extremely up-your-butt way of saying “parental abuse.”

Last semester, my professor wouldn't stop talking about intergenerational trauma and what a terrible childhood she had because her mom didn’t buy her a car in high school.

intergenerational trauma by anonymous April 25, 2022