I don’t know how but they found me 

A band which is loved by many. Lead singer is former panic at the disco touring bassist dallon weeks.

Person 1 “have you heard I don’t know how but they found me new song?”

Person 2 “yeah it’s great”

I don’t know how but they found me by Gaybyjskisygsywhbxhjsn December 23, 2018

I don't know what to say 

Often used when someone says something that is obviously a wrong/mistake/undependable, and the person who is listening can't say anything to defend his actions.

Jack: I missed the deadline for applying to NYU, because I read the email wrong.

Sam: They gave us a one week extension for that exact reason? Why didn't you submit it.

Jack: I was just so lazy about it.

Sam: I don't know what to say Jack, I guess that's a lesson learned.

I don't know what to say by thickjordanianbooty101 February 19, 2021

I don’t know what to type 

Wow you really don’t know what to look up on THE URBAN DICTIONARY wow this dictionary has everything

I’m so bored I’m gonna look up I don’t know what to type lol

I don’t know what to type by Pepsiboiiii September 21, 2019

I don't know what I'm going to do with you! 

Significant other is fed up or exhausted with the idea of you being around them.

Justin, you are getting to be too much and I'm confused about how I should handle you! You have made me mad/annoyed for the last time!!
("I don't know what I'm going to do with you!" is to be aggravated or annoyed by one's actions)

I don't know what I'm going to do with you! by anonymous November 18, 2022

I don't know what that means 

A common response that happens when an asker made a point
but the receiving end felt offended and looked down on the question.
Then quipped by the receiving end!

A: Hey any tips on how to make money?

B: I don't know what that means.

I don't know what that means by akamemake May 28, 2023

I Don't Know But…

A weblog, rather dry writing but the writer has loads of understanding.

It's a shame more people don't know about I Don't Know But…

I Don't Know But… by Korora March 8, 2004

I don't know what X means, but it sounds disappointing 

A phrase used by anyone who knows it. which displays a "I don't care, but i do at the same time" feel when its said.
The X can be replaced with anything, but depending on what X is changes "what" and "means", if its a person, it would instead be "who" and "is".
Usually saying this phrase, they put on a depressed tone and slur their words, specifically "sounds", and "disappointing". Usually said like : "Soounds Disappoooointingg..."

I don't know what X means, but it sounds disappointing.
1. Hey, meet my friend Bob!
2. I don't know who Bob is, but it sounds disappointing...
~or~
1. Try this food!
2. I don't know what food means, but it sounds disappointing ...

I don't know what X means, but it sounds disappointing by Generic Pseydonym January 9, 2017