fletsin 

-When someone tries to say you are flexing but they have shitty grammar so they say fletsin.
-a word no one knows or uses

Example: “boy you fletsin in that picture”

fletsin by TheKyle29 June 7, 2018

Flatsin 

Joking, kidding, not being serious

Dont take me serious, im just flatsin you.
I love your thunder thighes, just flatsin ya babe.

Flatsin by Erica Wren May 24, 2008

flessin 

To flex wit some finesse (see definitions of both)

I saw you on IG straight Flessin

flessin by PoleWoods August 18, 2018

fleasing 

a combo of teasing and flirting with someone.

He was mocking me but it was more fleasing than hurtful.

fleasing by booperchikadia June 5, 2011

Flensing 

Throwing your shoulders back in an effort to hide your man-boobs during sex.

With the large pizza still winding its way through Jim's large intestine he was more than a little aware of his recent weight gain. When he pulled off his t-shirt he stayed upright in the bed, flensing madly while making weird grunting noises.

Flensing by gutbloom July 23, 2008

Flensing 

The act of Jiggling a woman's breasts without her consent. Especially if her shirt has been ripped off or soaked in water.

Yo There was some mad flensing going down at the Peurto Rican parade this year.

Flensing by saltdog July 23, 2008

Flesting 

When you can't get it up and you're frustrated so you just start fisting the girl.

"Bruh my dick was so limp I just started flesting her"
"While he was flesting me he was crying"

Flesting by B-tanks August 4, 2017