Penile Flutter

An involuntary muscle spasm located in the male genitalia. This spasm can last for two to seven seconds, and causes can include sexual stimulation, sexual over-stimulation, urination, electric shock, or extraneous sensory perception. No medical attention is required, although you should contact your doctor if you experience a penile flutter lasting longer than four hours, or if redness or discomfort occur.

"Oh man, that girl at the end of the bar totally gave me a penile flutter."

Penile Flutter by Dr. Tobor March 4, 2011

Fluttershy 

The yellow pony from My Little Pony - Friendship is Magic.
Fluttershy is a pegasus (Has wings) and as her name describes her, she's usually timid and quiet, but she will always stand up for her friends.

She's one of the main characters of MLP, and has yellow fur, turquoise eyes and a pink tail and mane.
Her cutie mark consists of three pink butterflies with a blue body.

Fluttershy also has a passion for animals, and usually spends her time in the forest with them, but she's scared of adult dragons.

She came from Cloudsdale, a city up on the clouds above Equestria. Fluttershy wasn't as good in flying as the others, and was bullied and was called names like Klutzershy, but Rainbow Dash stood up for her.

Fluttershy: ...ʸᵃʸ............wait was that too loud?

Fluttershy by KikiMeowz August 6, 2011

Fluttershy 

Possibly the cutest cartoon character ever made. From the series My Little Pony: Friendship is Magic (MLP FiM) She is known for her incredible shyness, love of nature, and being the most kind, caring, thoughtful being in existence. Emotionally unstable at times, she tends to be afraid of everything, and at one point hid from her own shadow, while at other times, such as when she or her friends are endangered, goes into a rage that can make a full grown dragon cry. She also has an unnaturally strong connection with animals, and can understand them where others cannot. She had a staring contest with a cockatrice (a creature who's stare turns you to stone) and won, scaring the living hell out of it in the process. She represents the repressed person in all of us.

Non brony: what are you watching
Brony: My Little Pony
Non Brony: Why?
Brony: *Shows Fluttershy*
Non Brony: She's adorable and badass at the same time!

Fluttershy by DeadlyNightshadeZ November 2, 2011

flutter-blast 

A long, powerful fart that causes farter's cheeks to smack against each other.

Next time you have a flutter-blast to cut, please point your ass away from me.

flutter-blast by LaughingAloud September 10, 2005

Flutterguy 

Fluttershy (The Pegasus pony from My Little Pony: Friendship is Magic) with a deep black male's voice, as depicted in the episode "Bridle Gossip"

Applejack - "Good gravy, girl! What's wrong with you?!"

Flutterguy - "I don't wanna talk about it."

Flutterguy by TheBronyGuru August 15, 2012

Flutterby 

The origin of the name for an insect with colorful wings that is currently called a "butterfly", is a "FLY" that eats "Butter". Going even further back, the root of the name goes back to the dutch origin "Butter Shitter", because the dutch thought the insect poops on the butter.

Therefore, because of the incredibly non-sense name for this insect, I propose to re-name this beautiful insect as "Flutterby", which is a far more accurate name for it.

What a beautiful flutterby!

Flutterby by speak August 19, 2013

flutterpants 

Someone whose pants you can see moving as they fill and collapse with frequent and powerful fart action.

Fuck you flutterpants, why don’t you go stand next to another good friend?

flutterpants by Dr Bunnygirl August 17, 2019