When you're so bored you type 11223344556677889900 and decide to type 00998877665544332211 and still are not satisfied.
Person 1: I just searched 11223344556677889900 and I'm STILL bored.
Person 2: Try typing 00998877665544332211
Person 1: Wow, what a great idea!
When you type 122333444455555666666777777788888888999999999 and then decide to type 988777666655555444444333333322222222111111111 but there are no results so you make this.
Hmmm... I wonder if anyone has searched 988777666655555444444333333322222222111111111.
Nobody has? Guess I'll be the one to define it!