I don't know what 

English translation of a popular French phrase, used in reference to an unknown or illogical attraction one has to a person, place, or thing.

Salvadore: Bro, what's the deal with you and those Tofu dogs you are consistently scarfing?
Yanni: Dude, you got me. They just have this certain I don't know what.

I don't know what by Holy Moses Roller Brigade March 13, 2008

I don’t know what I’m doing lol

What you can say when you literally dead because of how bored you actually are.

Dude 1: i don’t know what I’m doing lol
Dude 2: cmon let’s go play sum minecraft

I don’t know what I’m doing lol by Ummmmm hi May 14, 2020

I don't know what to tell you 

A phrase used to tell another person to politely say, "I have no interest in continuing this conversation or listening to you complain." In its hardly ever used long form, it would be used as, "I don't know what to tell you to get you to shut up." Extensively used when people present you with a problem, you offer advice to them on viable solutions, but they come up with excuses why they can't follow your advice.

Person A; "complain, complain, complain. My car broke and I can't get to work now. And boss says he'll fire me if I miss another day!"
Person B; "Take the bus."
Person A; "There's no bus route within a quarter mile, and my feet hurt so much."
Person B; "Take a cab."
Person A; "I can't afford a cab with these car repair bills!"
Person B; "I don't know what to tell you."

I don't know what to tell you by Edward C. Microwagious IV May 31, 2010

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 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

I don't know what to write 

Well clearly that's false.

Write this when you have absolutely no idea what to write.

God I'm bored... Let's open google and search "I don't know what to write"

I don't know what to write by Harikjay February 6, 2019

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