What was the nastiest argument/fight you have gotten into?

i don't want to describe the details but i remember it ended up me splitting my step sister's lip in three places

They all blend together. *shrugs*

But probably... Either the one with my ex-bestie's new bestie, or the one with my ex-boyfriend that happened about a year ago...

It was with my father.
It involved a lot of yelling, tackling, kicking, punching, grabbing for knives

it was pretty scary.