Okay, Any time my friend goes on to trollmegle as Karkat, she gets yelled at by jades for using the word FuckAss and they state that the word is Jade's. So my question is "Who used the word fuckass 1st, Karkat or Jade?"

Karkat uses it on page 5151 before Jade uses it on page 5872

Technically though, John uses it first

I believe Jade uses the word one other time, and that is every use of the word in the entire comic thus far.