Idk is an abbreviation of the phrase I don’t know.
Idk is most commonly used in informal communication, such as text messaging.
Idk is most commonly used in informal communication, such as text messaging.
by Nathalie.anette September 29, 2018

I don’t know what the definition of “IDK” is.
Mom: *walks into room sees son on urban dictionary
Son: *changes the definition of blompkin to the definition of IDK
Son: *changes the definition of blompkin to the definition of IDK
by xXBumbCrumbXx March 6, 2021

Short for I don’t know.
Usually used In a text when the other person doesn’t have the energy to spell out I don’t know.
Usually used In a text when the other person doesn’t have the energy to spell out I don’t know.
by EvilSlime1352 February 16, 2019
