1. To scramble the way a cat would
2. To mess something up
I really scrungled up the situation.
(noun) To be cute, adorable, or endearing. The most common usage.
(verb) To pet an animal by softly grasping them by either side of the torso/head and ruffling their fur or otherwise petting them evenly on both sides. A bit firmer than a normal pet but 'tis the nature of the scrungle.
"Just a little fella... a scrungle if I've ever seen one"
"Don't forget to scrungle your cat every night"