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9+10

What you ask to find out if someone is stupid or not.
"Whats 9+10?"
"21"
"You stupid!"
by Annoying Piece of Shit? April 8, 2021
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Head on 10

by Mduceyinyobitchpussy October 24, 2023
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Say 10

Two words that YoungBoy Never Broke Again (NBA YoungBoy) uses in every fucking song but sounds like a Satan and its mean nothing just say 10.. the fuck.
YoungBoy: SAY 10
Karen: I'm calling the cops on you. You talking about Satan.
YoungBoy Fan: 10!!!
by Nigga named Dashawn May 22, 2022
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December 10

If you are born on December 10th you are actually perfect. Anything you do is perfect, even mistakes you do aren't a big deal. Doesn't matter if you're tall, short, skinny, fat, blonde or anything, you are just perfect.
Boy/Girl: When's your birthday?
Girl/Boy: December 10th!
Boy/Girl: That means you are perfect!!!
by Sagittarius73 November 2, 2021
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Serio 10

Serio is a solemn oath of absolute truth and loyalty used among close friends — a verbal contract that what you’re saying is real and must be believed. Serio 10 is the elevated, unbreakable version of that oath. It’s the equivalent of saying “I swear to God,” but on a deeper, more sacred level — a level 10 declaration of truth that cannot be taken lightly.

Once “Serio 10” is invoked, the statement must be 100% true — no exaggeration, no trolling, no lies. Breaking a Serio 10 is considered “abuse”, and doing so severely damages your credibility within the group.

Breaking it once leads to a loss of trust. Repeated violations result in social devaluation, exclusion, and eventual ostracization. Within this code, Serio 10 is sacred — if you use it, you better mean it.

Think of it as a verbal blood pact. You either honor it, or you’re done.
A: “Bro, I didn’t hook up with her. I swear.”
B: “Don’t play with me. Serio 10?”
A: “Serio 10.”
B: “Alright then. I believe you.”

... Later B discovers that A didnt actually hook up with her

B: "Abuse. Straight abuse. You're done."
by bmankobe August 22, 2025
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mermaidations 5:10

mermaidations 5:10 “thou must watcheth h2o”

-made by @aqua the dino
You’re a sinner, have you not read “mermaidations 5:10”? “thou must watcheth h2o”
by Aqua <3 February 1, 2023
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10 minute mail

A cool service which provides you a throwaway/temporary mail for well, 10 minutes.
Mark: What is the secret to your inbox? Despite all the things you signed up for, it almost looks squeaky clean!
Simon: Its ez. Just use some throwaway email, like 10 minute mail.
by %$2 October 6, 2023
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