Skip to main content
Urban Dictionary Merch
Your favorite words on things you can wear, drink from, read, or give to a friend.
The Urban Dictionary Store sells gifts you’ll have to explain.
A strong girl. One whom has the ability to overcome hardships. She might be unsure of an outcome, but everything always ends up just right. Comes from an Irish orgin, meaning "Fair."
Thing One: Fionna is one strong, fearless, little lady.
Thing Two: Yeah, she is. She keeps embracing life. The name serves her right.
Fionna by Mister Yes May 31, 2010
no...
fionna no...
fionna by whatishit June 10, 2021
A creature with ogre-like characteristics and displays long, ratty, fire engine red hair. This creature is unable to fit in small showers and wears a size 22 shoe. Unlike regular human beings, this creature is incapable of making their own decisions, therefore follows several people around like a lost puppy. Since this creature cannot make their own decisions, they often display seperation anxiety and may ask people several questions. This creature also has a tendency to be attracted to the same sex and excrete large amounts of sweat.
"OooOOhhh look at you hot momma" - Fionna

"Fionna, I feel uncomfortable when you look at me that way"- Normal human being
Fionna by Kiley Liverston March 26, 2011
hi i’m Fionna
Fionna : Hi my name Is
Fionna by svfttaehyung November 23, 2021

fionna and cake 

two characters in a show called, "Adventure Time". in the normal cartoon, its Finn and Jake. in the gender-swapped version, its Fionna and Cake.
"Fionna and Cake sure like adventuring!"

Fionna Ninja 

A fionna ninja is AWESOME!!!! It is only given to you. The person that has a H in the begging of his or her name is a fionna ninja.

There is also a monkey ninja, THE BEST THINGS IN THE WORLD !!!!!! They are the best climbers and very sneaky😁
Random dude: Helena is a fionna ninja!!!

Another dude: yea!!!
Fionna Ninja by Fionna ninja May 7, 2013
More from Urban Dictionary
korean word for madam, older woman
Ajumma wait a moment
Ajumma by aintnotinbutnice July 5, 2009
Word of the Day on September 30, 2026

Slop Grenade

When someone uses AI to generate a large document, slide deck, or piece of code/software and tosses it over the fence for you to deal with.
Chad: Hey Brent I sent you the new backend API change to review, it’s only 100 files changed.

Brent: he just tossed me a slop grenade
Slop Grenade by Joe Squid September 28, 2026
Word of the Day on September 29, 2026
Load more