Blatantly lying to others in front of the accused, about an action you know you committed, but have placed the blame on another.
I used a spool of cable wire as a leash for my friend's dog and ever since have blatantly denied it and blamed the dog's owner. He's tried to explain the truth ever since, in vain. Dog-collaring him has become a regular occurrence when we are together.
A play on the English writer J.K. Rowling's (writer of the Harry Potter Series) name. It usually means "Just kidding, and I am laughing aloud at the same time" or just "I am currently laughing aloud".
Frank: Dude you're such an asshole sometimes, you know Sarah and I broke up last week.