Advice on insulting people.

[ultima]

Jackson50 said:

Orca_Azure said:
And if psychological warfare isn't your thing, you can't go wrong with the classics-

response to anything a guy says: "your mom"
response to anything a girl says: some sort of oral sex comment.

Girls are also vulnerable to the "tuna" insult. Every person should have that insult in their arsenal.

What's the "tuna" insult?