Fesslehead 

Also can be called Fessle. A person who is lacking in common sense. Often confused with the plant fiddlehead

You are such a fesslehead!

Fesslehead by Jakeybaby June 21, 2006

Fessier

A man whose chosen profession and expertise is on the subject of the ass. Similar but less crude a term as "ass master" or "ass whisperer".

"Man that Antonio Luna is a real fessier. He may be a poor broke ass Mexican but man do those rich twinks keep chasing him."

Fessier by Hans Glockenspiel September 14, 2013

Fessle

Or Fessle-head. An unknowledgable person. Often confused with Fiddle-head.

You are such a Fessle.

Fessle by Jakeybaby September 1, 2008

Fissler

Verb. A minor sexual assault similar to groping or molesting, the act is usually carried out on a female by a male who has been a “friend” of hers some time. The act is usually a precursor to a more serious assault.

Girl 1: “I was out with Todd last night and he fisslered me, I feel abused.”
Girl 2: “That’s terrible! Maybe you should go to the police.”

Fissler by The Turnpike Architect February 15, 2009

Peter Fesler 

A Peter Fesler is a guy that is very fat and eats allll the time. He is also gay.

peter fesler stop eating that big mac

Peter Fesler by Local_fatty April 29, 2019

Fassler 

The most fucked up thing a person can do. Also can be used as Fasslering or act Fasslery

Friend:Yo did you see steve yelling being behind that deaf kids ear

You:Thats such a Fassler thing to do

Fassler by SolomoN GrundY December 19, 2012

fesser

Any person who attends or loves FESS. Mainly Rob, Chris, and Sean. See related words i love fess, beffer, genius.

Living a fair distance from FESS, i can't wait til i get to go see those FESSers.

fesser by Meh August 19, 2003