"Sorry, just pullocked myself out again... could you hit unlock again?"
It's as simple as it gets, just a combination of "pull" and "locked" which are the two things happening at the same time which are causing the trouble. It also sounds similar to "blocked" which is appropriate.
Jamie wanted to to seem energetic, harshly opening the Mercedes' back door and dropping into the fond. But Carl was distracted by a duck performing unspeakable acts upon the Head Mason's Rottweiler puppy and so he missed pressing the key-remote on time. His master came up empty-handled.