I'm writing a story and I have very mean character and this character is having an argument with his brother. They are throwing insults at each other. The brother has a biracial girlfriend and I wanted the character to throw harsh jab at the choice of girlfriend (she is Asian/white) I thought of 'mutt' but I was wondering if there was anything out there that could deliver a shock.

Here is a slang dictionary which might be of help.

http://www.coolslang.com/in/british/index.php

heres a few i can think of,

google racial slur database!!! great stuff
slanty eyed chink
gook,

In korean, to say America, it's pronounced "me g@@k", g@@k meaning nation. The americans took it literally and made it sound like
they're saying "Me g@@k" as in "I'm a g@@k".

Banana---- Asians---- An Asian-American who has lost their heritage. Yellow on the outside, white on the inside.

Boat-People --Asians or Cubans Could apply to any peoples who took a boat to immigrate to another country

Buddhahead-- Asians A lot of Asians are Buddhists.
Bug-Eater --Asians Many Asians eat bugs such as Locusts and Grasshoppers.

Dog-Muncher-- Asians--- They have been known to eat dogs; as seen on "Faces of Death" Volumes 1-6.

Fob---- Asians or Cubans "Fresh Off the Boat." Applies mainly to Asian and Cuban immigrants.

Honky/Honkie ----(2) Asians Asians hailing from Hong Kong.
ive also heard honky used for a redneck white person!

Jaundy Boy--- Asians Comes from Jaundice (Hepatitis), which turns your skin yellow.

Lemonhead-- Asians Skin color.

Meat Pie--- Asians "Yellow on the outside, black on the inside."

Nikon --Asians Popular brand of camera. Asian tourists are known to take a lot of photographs.

Nine Iron-- Asians Golf club with a dramatic degree of loft, ostensibly resembling stereotypical Asian 'slanted' eyes

Nuprin-- Asians "Little, yellow, different."

Pancake --Asians Facial characteristics.

Panhead --Asians Facial characteristics.

Ping-pang ---Asians Mimics the way their language sounds to non-Asians.

Race-Traitor ---Mixed Races White/Any other race mix. Term used by whites for any person of mixed race or who marries a non-white..

Rice-Eater ---Asians Popular food among Asians.
-
Rice-Paddy ---Asians Places where they grow rice in Asia and Japan.

Rice-Picker ---Asians Because they pick rice. Probably the Asian version of 'Cotton Picker.'

Table Face ---Asians They tend to have flat faces.

Tape Head---- Asians Facial characteristics--slanted eyes as if someone pulled back their eyes using Scotch tape around the back of their head

Yolk ----Asians Egg yolks are yellow.

Zipperhead ----Asians Coined by US soldiers during Korean War because if Asians were shot in the head with high-powered weapons, their heads would split as if you unzipped them.

As an AI language model, I'm here to help you with your writing, but I strongly discourage promoting offensive or derogatory language. It's important to approach writing with sensitivity, respect, and empathy, especially when representing diverse characters and relationships.

Instead of trying to find a shocking insult, I recommend focusing on creating realistic, complex conflicts between characters without resorting to offensive language or stereotypes. You can develop tension through conflicting values, opposing goals, or deep-rooted personal histories.

Remember, storytelling is an opportunity to foster understanding and empathy, and to challenge harmful stereotypes. Consider enriching your characters by exploring their motivations, vulnerabilities, and growth instead of relying on hurtful language.