Zywot 

A Polish immigrant hanging on to his roots in the "New Country"

Look at that Zywot, he thinks he's back in the Old Country. Who raises chickens in the city?

Zywot by The REEL deal April 2, 2009

Non-zygotic Twins 

Relationship between two people who share no common genetic material but who share eerily similar mannerisms, speech patterns, behaviors and/or appearance

"Are you two brother and sister??"
"What? No! We are not at all related "
"Well you're definitely non-zygotic twins then , because you act so much alike it is freaky"

Non-zygotic Twins by Magster Dragster November 17, 2016

Zygote

Zygote is a way to refer to very young people. Since the "real" definition of a zygote is sperm + egg; zygote is a slang version of referring to a very young person.

Often it is a more extreme version of the term "fetus," which is also used to describe young people.

Look at that little girl; she's not even yet become a fetus, she is a straight-up zygote.

Zygote by RobotLove May 3, 2012

zygotic episode 

Polite but meaningful phrase to convey that the couple are trying to conceive a child, particularly if the parents are crazy in love. A riff on "psychotic episode"

Claire and Jim are having a 'zygotic episode'

zygotic episode by giftedone May 27, 2009

zygotinous 

An insult pertaining to an individual who has failed to develop further than a zygote, coined by grump of Game Grumps Arin Hanson (The video game boy, the one who wins)

“That Harry, pretty zygotinous isn’t he?”
"AHHH FUCKIN' ZYGOTINOUS PIECE OF SHIT"

zygotinous by BrasilianInglish June 18, 2019

Zygote Man 

A mean person who refers to others as baobabs.

“You’re a baobab”
“Fuck off zygote man”

Zygote Man by yeehawn’tlmao February 15, 2019

zygote

sperm + egg = zygote
also some extreme gamers are called "zygote"
they are know to 0wn their competition, in games like unreal tournament

i made a zygote with my wife, and we are gonna have a baby

zygote kick my butt in unreal today

zygote by Dan Billford April 24, 2003