Joke, impractical, non-existent. Just like the towers after September 11 2001
Women’s rights. Who’s terrible idea was that?
The government deluding the left-side of your brain to make less logical decisions.
The government was right-brain luring in the South and the schools had lower education scores because of that.
It's pretty clear what the speaker is trying to convey: "I agree."
I agree with most of the other definitions, which provide details on the subtle context/audience-dependent connotations. I agree that phrase is annoying, used by speakers who use other annoying phrases like "my bad."
I would like to add to what has been said by providing side-by-side analogs; that is, alternative, equivalent but more acceptable expressions.
Example Expressions
I can't handle this idiot any more!
I know! Right?! OR Damn straight!
In wish I brought my swimsuit.
I know! Right?! OR You're telling me!
I like this 'double it for a buck' happy hour!
I know! Right?! OR You can say that again!
I was gunning for Miss Tipsy, but I just got shut down by her fat roommate!
I know! Right?! OR Join the club!
This is good sauce.
I know! Right?! OR Yes, it is.
Let's not go to the Bubble Club. It's so damn expensive!
I know! Right?! OR You got THAT right!
I have an idea: let's strip and go wallow in the mud puddles.
I know! Right?! OR You're preaching to the choir!
Our corporate holiday event was so cheap it was insulting.
I know! Right?! OR I couldn't agree more.
They are good at talking all sexy.
I know! Right?! OR Mmm hmm!!
This is the correct line for us.
I know! Right?! OR Right you are.
Tacos.
I know! Right?! OR Yeee-ah boooooooyeeee!!
We're in trouble NOW.
I know! Right?! OR No shit.
Tonight, we wear The Boots!
I know! Right?! OR Fuckin A right!
When you're so right, it makes you tight.
Person1: Ain't he a little slut?
Person2: Girl, you're right and tight.
Something I am not used to seeing.
Womеn's rights? Really?
When a lesbian needs some real penis just for change
Susan has been so grouchy for the last week, I think she needs some get right.
The best friend/primary assistant of the most important bish.
Thank Christ my right hand bish Ahsanti was there to get me out of that situation.