What is Jonesing?

[Dale Seago]

Now, imagine you are a kilt addict, and you just ordered your next kilt. You are now jonesing.

I would amend the description to add just one wee thing, to wit:

Now, imagine you are a kilt addict, and you just ordered your next kilt, and you know it's going to be _X_ weeks (or months) before you receive it. You are now jonesing.