2. this word/combination of letters is most commonly found in the same phrase as, "idk, my bff jill?" this phrase is found in those texting commercials.
mary: umm, idk.
2. emmy: who stole my cookies?!
mary: idk, my bff jill
Some guy: What the fuck is an idk???
Teenybopper: I dont know
Some guy: If you dont know what it means then why the hell did you say it??
Teenybopper: Uhh.... (Teenybopper has signed off at 14:42)