i'm sorry, what?

It's either you don't here something that somebody said correctly and you want them to repeat it or if you yell (or put in capital letters if you're are writing it) the "what" it means that the other person just told you something that you don't like or unpleasantly surprised you.

1)

Friend: I can't wait for the fair tomorrow!
You: (busy preparing for the fair) I'm sorry, what?
2)
Boyfriend/girlfriend: I'm braking up with you.
You: I'm sorry, WHAT!!!!!!!!
Notice the difference????

I'm just sayin'

The irrefutable way to diffuse any situation. Saying "I'm just sayin'" is to be used immediately after a burn, or after a distasteful opinion is given. There is no response to "I'm just sayin'," that cant be followed up with another "I'm just sayin'"

with the proper use of this tool, it is possible to deliver a rude comment or burn and have it bounce off simply as an opinion disguised as an objective opinion, and who can argue with you over an opinion that you dont apparently support.

-" Hey man, Stacey didn't call me last night, I think she was with another guy."
- " Well remember the way she was in high school? she was a huge slut."
-"DUDE!!! Thats my fiancé!"
- " I know, I'm just sayin'"
- " Well ok, but she's not a slut anymore."
-" I'm just sayin.'"

I'm such a nice person

A quote to be said, whenever you perform a total dick move, or when retelling a total dick move.

Yeah I totally anaconda-choked Paul while he was drunk,

and then I left him unconscious on the beach for, like, an hour.
Dude was bitching and moaning from sunburn the next day,
so I choked him out again.
I'm such a nice person.

I'm so wavy

The saying "I'm so wavy" was made famous by Ty Dolla Sign's song 'Wavy'.
Saying "I'm so wavy" or saying that someone else is "wavy" means that they or you are "cool", "fresh" or "fancy". (Like me)

Damn, Fabi is so wavy. I'm so wavy, so we should hook up!

Bitch I'm in a tree

A recently coined term in online gaming, especially during player versus player combat.

It means "I am so far above you," and "you can't even touch me" rolled into one phrase

noob: DUDE WTF WHY CAN"T I KILL YOU!?

pro: Bitch I'm in a Tree!

I'm Really Feeling It!

Some annoying old Shulk meme that is overused in smash.

Shulk: I'm really feeling it!

Me: SHUT THE FUCK UP

I'm going to hell!

An exclamation many shout when they have done something worthy of going to Hell.

John: Hmmmm.... That was great last night sis!
Sister: Yeah, wanna go again?
John: Ok! I'm going to hell! So why shouldn't I live before I do!