Doublay should be used instead of Double at all times.
Oh my god, PA did the Doublay!!!
A doublay is when a person vomits and shits his/her pants simultaneously. It can also be called a blay, if you just shit yourself, with no puking action.
I first heard of this term from a zine made by a member of a punk band called Marilyn's Vitamins...they heard it from a band called Choke.
Aww man...I was so wasted last night...I did a doublay right outside the bar.