Usually seen as a gay boy and or a complete idiot. A flannel boi is a mean word used by a person/character called DankPrincess. This was first used in november of 2017. This was used to insult a gentleman named Liam. She used it in a very offensive way reffering it in a bad way.
Liam you are a real flannel boi.
Wtf lol, you flannel boi.
We used to have fun, but then this flannel boi came along
Wtf lol, you flannel boi.
We used to have fun, but then this flannel boi came along
by fillakilla12 November 10, 2017

by Jewet May 28, 2018

when two partners in a sexual act both have aggressive herpes. the herpes so bad in fact it creates a flannel weave which is then stuffed until it it has reached capacity.
by Hung Monkey August 30, 2019

A guy(Cis or trans) that is known to prefer the company of lesbian women for platonic relationships.
Is thought of as the equivalent (counterpart) of a woman who is known to associate with gay males. (Fruit fly)
Is thought of as the equivalent (counterpart) of a woman who is known to associate with gay males. (Fruit fly)
Why is he always wasting his time with those women, doesn't he know they are all lesbians?
Nah, he knows, he is just a Flannel Fly.
Nah, he knows, he is just a Flannel Fly.
by Flannel Fly 66, LLC March 21, 2017

by dirk-diggler69 June 30, 2021

The middle aged, disapproving chaperones.
by Mddrs August 15, 2012

a type of government where each person gets a square of fabric and individualism causes unorganised squares, while together, they are a collective being; a collective flannel
that country is a flannelism!
by the_cernigs March 15, 2011
