At the beginning of her interview on The Tonight Show, Victoria Justice noted that she cut her Hawaii vacation short to be there. While snorkeling there, Victoria Justice took a selfie and coined a new phrase:
Urban dictionary, you’re welcome.
Now, while “snelfie” already has an entry on Urban Dictionary under a different meaning, that doesn’t make this particular useage any less original. And so Jimmy Fallon took that idea and made a game of it. The two took three words from Urban Dictionary and tried to determine their meanings. This didn’t seem worth missing an extra day of vacation, but Justice played it off much better than I would have.