Top definition
a screechy terrifying young girl who scares the living shit out of me
also a lil' bitch who will kill if you even mention sans not being real
Me: did you see that sans fangirl
Sans Fangirl: WAT U SAY ABOUT ME
by Whyjust...why June 23, 2017
Get a sans fangirl mug for your cousin Rihanna.
Aug 11 Word of the Day
A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.
"My boyfriend has a total case of brain worms. He told me the cat was bugged so the Feds could listen in on us having sex..."

or

"You totally stumbled over that entire sentence. Can't speak English all of a sudden? What, do you have brain worms?"
by _Jez_ October 03, 2009
Get a brain worms mug for your father-in-law Jerry.
2
Someone who really likes sans undertale likes them so much they start to fangirl over them, pretending that they are sans' wife, even though sans is a fictional character. If you try to talk some sense into them, they'll just keep coming at you with shitty videos of their oc killing you.
Fangirl: OMGG!!!!, I THINK SANS IS SOO CUUTEE!!!!!!
Sensible human being: you know sans isn't real?
Fangirl: BUT I WANT HIM AS MY HUSBAND!!!!! I'M HIS WIFE NOW
S.H.B.: But he's a fictional character.
Fangirl: FRICK YOU!!!! I'M GONNA MAKE A KILLING VIDEO ON YOU!!!!
S.H.B.: you're just another sans fangirl.
by rshiba April 18, 2019
Get a sans fangirl mug for your girlfriend Yasemin.
3
Mainly edgy as fuck has sex with sans on camera all of them look like trash they always uses sans’ quote from the genocide run in undertale “your gonna have a bad time” all have animal ears and tails or they just have over exaggerated curves make horrible animation memes say they are sans’ wife and girlfriend (why do you say that you can’t be two things at once) ALWAYS have alternate versions of themselves make killing videos and they all hate cringe compilations even though they are in most of them don’t know grammar (that’s it)
It’s hard to find sans fangirls that don’t fit this definition
by Starrysanswhohas_met_every_one December 07, 2019
Get a Sans fangirls mug for your barber James.
4
A fucked up person who makes cringe about her oc and sans

A person who will murder you if you touch her sans even know you cannot kill people on the Internet
by Phoenix the trash weeb February 18, 2021
Get a Sans fangirl mug for your cat Rihanna.
6
A girl who is a BIG fan of Sans and loves him and often thinks dirty about him. They will ship Sans with Frisk just to imagine theirself with him. Like me sometimes,
My friend Stacy is s total Sans Fangirl. “
by ShinyUmbreon6577 April 17, 2020
Get the Sans Fangirl neck gaiter and mug.