Here's why:
* No dictionary entries: No standard dictionaries list "trickleydidlier."
* No common usage: The word doesn't appear in common language or literature.
* Potential misspellings: It could be a misspelling of a real word, but it's difficult to guess what it might be without more context.
To help you get a better answer:
* Provide context: Tell me where you encountered this word. Was it in a book, a conversation, or a song?
* Consider the spelling: Is it possible you misspelled another word?
* Think about the meaning: What was the intended meaning of the word?
With more information, I might be able to help you understand the intended meaning of "trickleydidlier."