Text jargon for "I don't know." The abbreviation saves individuals significant time when relaying their stupidity via text message.
Cathy: omg cindy i hav no idea how 2 put this condum on my bf do you no how
Cindy: omg idk!
Cathy: lol
Cindy: omg idk!
Cathy: lol
by erikstangents December 18, 2011

person 1)hey, do you know what IDK means?
person 2) I don't know is what it means
person 1)well we need to find a person that does
person 2)here we go again
person 2) I don't know is what it means
person 1)well we need to find a person that does
person 2)here we go again
by chance griller May 20, 2022

Idk means I don't know. It is commonly used in text or in YouTube comments. It is a form of internet slang, the most common one of all.
"Where's Sarah?
"idk"
"idk"
by idk_definitions May 17, 2018

by fdhgsuihrejksndcbvuipewr August 8, 2007

Examples:
Emma: What time do we have to hand in our homework?
Lola: Idk
Rachel: Who is she?
Samantha: Idk
Emma: What time do we have to hand in our homework?
Lola: Idk
Rachel: Who is she?
Samantha: Idk
by idk_definitions February 8, 2018

Idk, dude. Shit's hard rn.
by 051818 January 13, 2022
