You’re dead to me 

2 definitions:

1. A phrase used by parents in utter disappointment of their child
2. A phrase used by friends of others mainly because their friend is boring, or if their friend did something that hurt the person’s reputation

Situation 1:
Dad: hey son, don’t touch that cactus
Son: *touches cactus*
Dad: your dead to me
Situation 2:

Friend: *has no interaction with anyone whatsoever*
Other friends: you’re dead to me
Situation 2.5:
Friend:*shows his/her absolute ass in front of everyone, embarrassing their friend*

Other friend: you’re dead to me

You’re dead to me by Butt_fucker69420 May 15, 2022

you're dead to me 

old english saying that was used to announce that the person in question was disowned or would never be "seen, or heard" again.

you slept with my wife.....you're dead to me

the origional aiel used the term in a Robert Jordan book as well, but in a more wordful way

"You killed some one, you are dead to me and the rest of the True Aeil......Turn away from me i wish not to see that face, my son had a face like yours, but alas he is dead to me?

you're dead to me by Sir Killalot January 5, 2007

You're dead to me. 

A phrase, if used too often and with poor discretion, that eventually loses its initial impact.

Mortimer: Ethel, if you don't pass me that pan of steamed asparagus, I'm serious this time, you're dead to me.
Ethel: Give it a rest, Mortimer.

You're dead to me. by bandit bob October 9, 2009

you're dead to me 

To be used to tell someone off when someone tells the dirtiest joke you can possibly imagine.

Wanda: Why are little girls better than little boys? You can flip her over and then they look just the same.
Boss: That's the dirtiest joke I've ever heard. You have completely wrecked my plans to ask you out on a romantic candle-lit dinner, nail you, and finger guns to our fellow employees. You're dead to me. And you're fired.

you're dead to me by p@$$ing thr.ugh December 31, 2010