This happens if you get really wasted at a party and end up in bed with a lumpy sausage-shaped woman. When you scurry to the door you find that it is locked (hence scur+locked) and only she has the key. Thus you end up spending the night with said lumpy sausage woman. Shame on you.
Guy1: Fuck I was so high last nite I ended up with Fannie. I tried to leave but got scurlocked!
Guy2: Ahh sorry to hear that, dude. Theres some Lysol over there.