SAN

Abbreviation for Sino-Atrial Node, found in the heart and a key part in the regulation of your heartbeat.

The Sino-Atrial node (or SAN for short)
is found in the mammalian heart.

by Keegs November 29, 2004

Sans

A Lazy Bitch full of puns from Undertale and he annoys his brother.

Look there Sans with his puns

by Thegirlwhoplaysundertale321 June 6, 2018

Sans

A character from the game Undertale by Toby Fox. He is a skeleton monster who wears a blue hoodie, basketball shorts, and pink slippers or blue tennis shoes. He is brothers with another skeleton monster named Papyrus. Several people in this fandom want to fuck him. I'm not sure why. He is seen in multiple animations or
deviantart pictures with a lightsaber dick. Fangirls (and boys) tend to call him "Sansy" or "Snas".

Fangirl: OMG! I just saw a picture of Sans with a boner!
Non-Fangirl: .....Cool....

by big dicc energy uwu May 7, 2019

Sans

One is the Best people in the universe
The one the only sans skeleton from the game known as undertale

Sans

Roses are red
His jacket is blue
You chose genocide

Now you get bad times to

by Jayray20 October 26, 2020

Sans

A skeleton that does nothing.

Sans better be in the smash dlc

by LemonyFreshVEVO January 16, 2019

Sans

A real joker and isn't very open but is nice unless you mess with someone he loves then he's a cold badass and is very lazy.

Sans is a nice and sweet person.

by LexiFire January 28, 2017

san

Sanity.

Originally taken from the roleplaying game Call of Cthulhu. In this game you'd play as mortals trying to retain their sanity in the face of Lovecraftian horrors from Beyond. More recently however, the term has been used more casually to describe sanity in all its aspects. Almost always written entirely in capital letters, as it was on some of the character sheets for the game.

Person 1: "Did you see the first Dungeons and Dragons movie?"
Person 2: "Yes, unfortunately. It wasn't a horror, but I swear I lost SAN."

by skywyze February 27, 2008