A fork of Rural Dictionary
When the sentient observers within a situation are too concerned with being disruptive or offensive to the sensibilities of others and/or the dangers of the situation(s) at hand, and fail to take even the smallest action that could have resulted in a butterfly effect that could have otherwise changed the situation(s).
Excessive systematic recurrence of the fluttershy effect tends to lead to a buildup of silent intolerance for situations, eventually resulting in fluttershychosis.
when a brony somehow obtains a very shy girl to give him fellatio. she usually talks quietly after the brony ejaculates in her mouth. (she also wonders what she would do with it as wanting to spit it out but doesn't want to be rude.)
guy 1:ah man i heard mike got some fluttershy fellatio.
guy 2:yeah you two are such bronies!
A way to use the word fuck in polite company, and still get back at the maaaaan.
...Or the key to the cage in which Fluttershy keeps all the unicorn ponies she's captured...
Kirby: "Poyo!"
Random Guy: "I honestly don't give a Fluttershy Unicorn Cage Key Kirby, I really don't."