I didn't know you were chill like that 

I Didn't Know You Were Chill Like That, originally known as I Didn’t Realize You Were Chilling Dog, refers to a viral video trend on TikTok that involves one person in a car, predominantly a Tesla, giving a peace sign or hang ten sign to someone annoyed at their behavior. The trend started in mid-2022 on TikTok.

Walter white: Jesse do you wanna cook?
Jesse: Mr White I didn't know you were chill like that!

I didn't know you were chill like that by Adolf Peterson October 17, 2022

Reading? I didn't know you could read. 

The sentence Draco Malfoy says to one of his goons (that is actually Harry in disguise) when he see that he is wearing glasses

Person one: "Why are you wearing glasses?"

Person two: "Uh. Reading?"

Person one: "Reading? I didn't know you could read." *Looks kinda impressed*

Reading? I didn't know you could read. by Clara Winters July 17, 2022

I didn't know you were Emo 

When in a state of utter failure or just feeling like crap, rubbing your hand across your wrist like your cutting it and as a joke someone anouncing that you are now emo.

Bob: *air cutting*
Bobby: "Geez, I didn't know you were emo!"

I didn't know you were Emo by Carteloise July 18, 2009

i didn't know you had a kitchen 

something white people say to Islanders and Africans cause apparently they dont have kitchens.
usually used in very rasist context

i didn't know you had a kitchen

white person "i didnt know you had a kitchen cause your so poor and black"

black person...

i didn't know you had a kitchen by yahoodhomie January 23, 2022

i know you didnt 

A common reaction when in disbelief of someones actions or words.

Ohhh know you didn't! How you gonna play me like that?

i know you didnt by Sophie February 11, 2005