"I read the description that started Wordforthat.com the same day my boyfriend took me to dinner and I Lock-blocked myself out of his truck."
"Dude, I accidently pre-pulled. Can you unlock my door again?"
"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.