BFF Jill 

In reference to Best friend forever, as in the commercial...
Mom: Who are you texting so much?
Girl: I DK, my BFF Jill

Anyone you hang around a lot, for work related reasons or otherwise, even if they aren't your best friend.

RIck: AnnMarie, where is your BFF Jill?
AnnMarie: I don't know. I feel lost without her, we've got to get this project done for Monday.

BFF Jill by Lanny123 December 30, 2008

BFF jill 

hold out your right hand in front of your face, fingers spread out, palm away - the fingers of your hand should spell out "jill" respectively; referred to when someone is suspected of masturbating

you were in your room for awhile. spending quality time with your bff jill?

BFF jill by dulcedelecheistheshiit December 21, 2008

bff jill 

your best friend forever
sometimes named juill

from the cingular texting commercial

mom: " you have you been texting 50 times a day?!"
stephanie: "idk, my bff jill?"

bff jill by clairerocks July 9, 2007

BFF Jill 

1- A person you consider your friend, but not your most favorite person.

2- secondary bestfriend.

"I was at the mall the other day and saw my bff jill. i was dreding every second of that hideous conversation."

BFF Jill by Kay Luh September 27, 2007

IDK My BFF Jill

Best commercial ever created

Mom: Who are you texting three hundred times a day?
Kid: IDK My BFF Jill

IDK My BFF Jill by zak221133 May 25, 2007

my bff jill

Means "I don't know". A shortened form of "IDK, my BFF Jill?" from the Cingular commercial.

Mom: "Beth Ann!"
Beth Ann: "WU?" (What's up?)
Mom: "Your cell phone bill is what's up. All this texting!"
Beth Ann: "OMG, INBD!" (Oh my God, it's no big deal!)
Mom: "It is a big deal. Who are you texting 50 times a day?"
Beth Ann: "IDK, my BFF Jill?" (I don't know, my best friend forever Jill?"
Mom: "Tell your BFF Jill that I'm taking away your phone."
Beth Ann: "TISNF!" (That is so not fair!)
Mom: "Me paying this bill, that's what's...S...N...F!"

Person 1: Dude, where'd you get those jeans?
Person 2: Uh, my BFF Jill.

my bff jill by Elvi January 12, 2008

idk, my bff jill

A funny quote from a cell phone service provider commercial (that probably doesn't work, but their advertisers know how to do a good job) after a mother asking their young daughter why the texting bill is so expensive. It's a common way to answer annoying questions to Myspace surveys or generally obnoxious questions

Annoying girl says, "So, who do you have a crush on?"
Response, "Idk, my bff jill."

idk, my bff jill by Basket Case November 1, 2007