The coolest contraction ever

Early today, I used the word y'all'll in an e-mail. This is, of course, a contraction of y'all (y'all, of course, being a contraction of you and all) and will. It's prounounced YAWL-ill, and it's usage is as such: You don't need to decide now whether you'll spurt on her face or on her boobs; y'all'll figure it out when it happens.

Someone call the OED, huh? I want credit.