What does it mean when someone calls you a mutt?

Mutt may refer to:

Animals:

Mixed-breed dog, a dog that has characteristics of two or more breeds, a mongrel. Also used as a generally derogatory term towards a dog.
People:

A colloquial term for people of very divergent ancestry; can be pejorative, neutral, or positive, depending on the context
Nickname for Rodney Mullen, worldfamous skateboarder
Robert John "Mutt" Lange, a successful music producer
Nickname for Joseph Summers, a mid-century English test pilot
In music:

MUTT, an album by Roots music group, Lost Dogs
"Mutt", a song from blink-182's 1999 album Enema of the State
In comics:

Mutt, a character in the Mutt and Jeff comic *****
Mutts, a daily comic ***** by Patrick McDonnell
Mutt may also refer to:

M151 MUTT, (Military Utility Tactical Truck), a US military jeep / light truck
MUTT (MUD client), Multi-User Trivial Terminal - a gaming interface for Windows
Mutt, a character from the G.I. Joe universe, usually accompanied by a dog named Junkyard
Mutt (e-mail client), a terminal-based e-mail client for Unix-like systems
Mutt (hinduism) (also spelled as Math and correctly as maṭha), a type of Hindu monastery
Mutt Williams, a character from Indiana Jones and the Kingdom of the Crystal Skull, played by Shia LaBeouf

I've only heard people refer to themselves that way, not to others. It just means you are from many nationalities, which genetically is far better than coming from one tiny inter-marrying gene pool.

That you have many nationalities in your heritage. Trust me, that is good thing because you are much more unlikely to get illnesses, like my disorder which is not something you'd want.

i agree with whomever said it means the person saying it has no manners. people are NOT their upbringing/lineage/$ inheritance or not....they are INDIVIDUALS, every one.

Well, it's not a compliment. They are implying you are a dog.

Durban is a bit long winded today. Hehehehe.

They think of you like they must think of Obama and Tiger and Jeter and Mariah and Alicia Keyes and Selma Hayek and Halle and the late great Bob Marley, peace be upon him.

A gowd darn dirty cross breed?

Hey maybe durbanpoison explains it more acurately?

rain5
It means that people can't tell what race you are. People usually end up staring for a very long time. That happens to me every where I go.

That they have very bad manners

Mutt, no matter who says it or what group they identify with, it all boils down to one logical understanding:

It would mean; A person of Poor Breading or One who does not have a heritage of class, or up bringing.

The British have their "Blue Bloods" and their pets are Pure Breads. Anything below that class, is a Mutt, human or animal. This is what a "Blue Blood" explains to me.

my ugly and cruel sister.