Oppai is truth 

Term used by the anime/weeb community to express their liking for a anime girl with particularly large breasts.

This phrase is for the people who like those them big ass tiddies
Largest oppai out of "flat is justice" and "medium is premium"

Megumin = Flat is justice
Aqua = Medium is premium
Darkness/Wiz = oppai is truth

Oppai is truth by F1ynn June 23, 2021

Oppai Dragon 

The best person ,the true king of the world!
He has a very big harem,over 1 mil. girls!!!

The girl:Do u want to be my Oppai Dragon?
Oppai Dragon:Of course!

Oppai Dragon by Karmanigger69 March 2, 2021

Oppai Day 

Nation Holiday where every women has to send their oppai to every man they know.
It is held on the 12th of April for unknown reasons.

"hey, it's soon Oppai Day"
"Yeah, ikr, I can't wait"

Oppai Day by Almoss April 7, 2022

oppai seijin 

Person who loves big tits (esp. anime titties)

Pedestrian oppai fan: Bro did you play this god tier nukige called oppai academy?
Based loli enjoyer: I ain't no oppai seijin ya dipshit. I only play lolige.

oppai seijin by pyun pyun April 14, 2022

oppai loli 

oppai lolis are an enemy for healthy society.
IF they exist, then God isn't real and civilization is DEAD.
If oppai lolis exist, do the final solution protocol of total T-OL-D
Total Oppai Loli Death to be enacted to save globally the human morality.

"Hey teach do you want to release your milk in my big mushy two pillows?"

"No... But... Uh..."

"Well, do you want a taste of oppai loli boobs?"

"Uuhh.hh.h.h..... Please, Jesus Christ.."

oppai loli by Andrew Whiteingale W w00t March 10, 2025

pp oppai 

It is when the nips can be as big as a baby's or adult's penile.

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pp oppai (long version, translated); Penis Penis Breast
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Mostly found in women and kinky hentai / doujins / possibly porn too
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Be aware, who ever likes these kinds of things are a total perv.

P1; Did you hear?
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P2; Hear what?
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P1; Your seatmate is so~ into pp oppai.

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P2; Really? She must be cool and perverted.

pp oppai by Penile Erectile April 9, 2020

Oshiri Monco Oppai 

Usually chanted while making a circle of T-posing individuals. This statement both sends demons into an item (in the center of the circle) and brings them out. The sentence itself is absolute nonsense in every language. The sentence translates to Ass Vagina Boobs, originating from Japenese.

30 people standing around a grape: Oshiri Monco Oppai, Oshiri Monco Oppai, Oshiri Monco Oppai, Oshiri Monco Oppai, Oshiri Monco Oppai...
You: ...no

Oshiri Monco Oppai by Vincent Does Things October 12, 2019