Elf-it (verb) is to bluff to someone you love that you watched their favourite Christmas movie with them. Convincing them you watched it by describing it as "Christmassy" when it clearly is not "Christmassy".
This term is now used in general conversation when you have told a white lie: you elfed-it/to elf-it
Stuart was so busy eating Chinese food that he didn't watch the film that Susie had asked him to watch with her. She knew he'd elf-it and she was correct. Stuart sat on a "throne of lies".
An activity generally practiced by the elves of Santa. During this time, elves practice the elfiness and fine-tune their pointed shoes. Skipping elf practice to practice dentistry is universally frowned upon.