A boss character in Undertale that is skeleton and likes to give you a bad time if you killed everyone. The only way to fight him is to be a major dick and kill everyone. Its the only way to level up as well. Sans is generally a pain to fight and one of the hardest enemies in Undertale.
by TexasRed May 24, 2019
Get the Sansmug. Sans : It's a beautiful day outside, birds are singing flowers are blooming. On days like this kids like you....
SHOULD BE BURNING IN HELL
SHOULD BE BURNING IN HELL
by Infochan July 10, 2016
Get the Sansmug. 
A fictional character who is a skeleton from the rpg game,Undertale.
His appearance is a skeleton with a short stature who has a wide smile.
He also wears a white t-shirt with a blue hoodie, and black shorts with white stripes and a pair of slippers.
Even though Sans only deals one damage in the game, if you get hit by one of his attacks, it gives you a 'poison' effect.
His appearance is a skeleton with a short stature who has a wide smile.
He also wears a white t-shirt with a blue hoodie, and black shorts with white stripes and a pair of slippers.
Even though Sans only deals one damage in the game, if you get hit by one of his attacks, it gives you a 'poison' effect.
by London England♥︎ August 1, 2017
Get the Sansmug. A character from the game Undertale who has oceans of fan girls ruining his character and who tells puns, eats ketchup, and hes the "fan favorite". He has a brother named Papyrus.
by apersonthatyouwontlike April 18, 2017
Get the Sansmug. 
A pun telling skeleton who can also beat your ass in a fight. Sans is a former human, some even theorize he is a character from Earthbound another popular video game made by nintendo
by Mr. Meme Dream Supreme September 27, 2019
Get the Sansmug.