Fido 

Fidel Castros nickname.

Eeeyy Fido, wazzup! U wanna hang a bit bro?

Fido by Karlsson October 26, 2006

Fido 

First In Destroys Others. A significant other, usually a man who knows he is with somebody out of their league. So they marry that person before they have a chance to realize they can do better.

I don't know what Sarah sees in Adam. He's ratchet so at first I thought it must be a winning personality, but he's annoying too. He's a fido, she can do way better.

Fido by Cabaill May 21, 2013

Fido 

A state of sorrow only reserved for situations where one is unable to or is ineffectual in attempting to understand what happened. One may only ever experience them when a loved one suddenly dies.

Example:
Fido, the police dog, placed his paw on the closed casket.

Fido by kuthulisazh June 3, 2013

Fido 

Waste matter that has passed through the anus of a dog (Canis). All too frequently malodorous; generally displeasing.

"Tom & John both trod in a fair amount of Fido while playing football in the back garden, then unthinkingly brought it into Mary's clean house on the soles of their new sneakers, soiling the scullery floor."

Fido by LevTrotsky April 3, 2017

Fido 

Faithful, loyal friend

Oh, you mean Josie? No dude, shes totes fido, she would never cheat.

Fido by Teachurs Sub January 13, 2020

Fido 

N.
Worker, fetcher, or basically anyone you can order to do various jobs. The best example of this is Fido from the GTA game series which is the main character who does many jobs for local crime bosses.

That fido will do anything you say.

Fido by Slavik Von Stockholm May 3, 2005

Fido 

amazingly hot junior/senior boy who frosh like to follow and look at while being pathetic together.

"Hey Lulie, let's go look at Fido!"

Fido by theinformed1 September 16, 2008