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Means "son of" (hence all the English surnames like Fitzpatrick, Fitzhenry) but can also refer to an illegitimate child, a bastard, someone born out of wedlock etc.
FitzChivalry is the illegitimate son of Chivalry, the heir to the throne of Buckkeep.
by Andrew Melvin April 26, 2008
1. noun- full retard

2. verb- to instantaneously lose control of your bowels in an unannounced fashion. Usually resulting in going commando for the remainder of the day.

3. adj.- awesomer than everybody and everything around you.

4. adj- The inability to come up with a response to an insult, usually resulting in threats of sodomy.
noun- "Is your brother Autistic? No, it's worse, he's a fitz!"

verb- "Oh man, I'm 75% sure i just fitzed myself."

adj- "I'm sorry, I couldn't hear you over the sound of how fitz I am"
by 725ftn February 27, 2011
A nick name for someone with the last name Fitzpatrick or Fitzgerald.
Dude Fitz was fucken baller today he hit a 3 in Nick's eye.
by Fitz Frum Tha 818 October 24, 2007
1. A suitable name to dipsnap to.
2. A kid who is popular because his name sounds cool if you say it loud enough.
"I'll dipsnap to that!"

"Fitz is a really cool name to say loud."
by berkojew October 03, 2008
the art of coordinating clothing and accessories with name brand shoes
Jane is wearing a green shirt, green jewelry, skinny jeans with her brand new green Chucks. She think she got fitz!!!
by Spice1871 June 18, 2009
a cut on your thumb or a cut on any finger
That fitz looks like it might hurt.
by Big A Boo March 18, 2010
To take your workload and pass it on to an unsuspecting co-worker.
Placido, “How's it going?”
Magglio, “Well, I was having a good day until Ivan fitz’ed me with his project!”
by Q Wizzle October 25, 2006