I don’t know too much about that 

It’s basically disagreeing with someone’s idea or statement

Friend 1: Hey, I found these cool suede pants at a thrift store. What do you think?
Friend 2: I don’t know too much about that

I don’t know too much about that by sandrafizzle January 23, 2020

i don't know what to search

Well, if you don't know what to search in the urban dictionary, why not try to solve this problem:

Evaluate ∬ yz+4xydS where S is the surface of the solid bounded by 4x + 2y + z = 8, z=0, y=0, x=0.

S

A: "I don't know what to search so I searched i don't know what to search."
B: "You searched i don't know what to search so that's means you know what to search. Liar."

i don't know what to search by Solve that problem! Right now! April 12, 2021

I don't know anything about that 

An expression indicating extreme doubt, often implying that the suggested remark was untrue, a backhanded stab by passive aggressive speaker who won't come out and say they think you are full of crap.

Synonyms: Passive Aggressive, Liar, Full of Shit, Full of Crap, Calling Bullshit, Bullshit, BS

Antonyms: Truth, Open, Direct, Honest

Related words: Mother In Law

Normal Guy: "Unemployment went down this month again."
Passive Aggressive Guy: "I don't know anything about that."

I don't know anything about that by DILUnderSiege May 19, 2010

I don't know, u? 

Possibly the least intelligent response to any question asked. Credited to David Alan Weinshel (Wheeler 02', BU 06')

weinberg: yo dave, you in the room?
weinshel: i don't know, u?

I don't know, u? by Steven Muntner *see RAT-MAN February 28, 2005

i don't know, hun 

The thing my boyfriend says when he really doesn't wanna talk about something...he says it a lot.

Liam?
...yeah?
What's your favourite thing about me?
I don't know, hun.

i don't know, hun by Liam's Main Skweez April 10, 2005

I don't know you 

A term used as a greeting, an insult or comeback, a conversation filler (to fill an awkward silence) and a game by adding a word to the sentence. Coined by Cameron, also known as Camen bu in March 2013. Also used as "I don't even know you!," this version is generally when spoken by really white people.

Greeting:
Person 1: Hey Bob, how you been?
Bob: I don't know you!

Insult/Comeback
Person 1: Bob, that was a terrible speech.
Bob: Bro, I don't care what you think, I don't even know you!

Conversation filler (fill an awkward silence)
Person 1: Bob, will you go out with me?
(Awkward Silence)
Bob: I don't know you!

Game
Person 1: Bob, I don't know you!
Bob: I really don't know you!
Person 1: I really don't even know you!
Bob: I really totally don't even know you!
Person 1: You win Bob.

I don't know you by StoogeKebab June 9, 2013

I don't know what to tell you 

A saying that's used to tell someone nicely that nothing is getting done about something,that they simply don't care or that you're "shit out of luck"

Employee: "We have a lot of work and no time to do it" Boss: "I don't know what to tell you"

I don't know what to tell you by battleaxe June 13, 2017