Oupelaye is a French-Canadian word for when you mess up or you know you are about to mess up. It's usually used for minor screw ups but it can be appropriate for major screw ups.
I wrote this a 5:11 pm...
Oh wait now its 5:14 pm.
What time is it?
-5:11 pm
That was 3 minutes ago.
Ok so its now 5:15 pm