Possible interpretations:
* Misspelling or mispronunciation: It could be a misspelling of "lickety-split," which means very quickly.
* Slang: It could be a slang term with a specific meaning within a particular group or region.
* Made-up word: It might be a word made up for comedic or creative purposes.
Without more context, it's impossible to say what "lickadick" truly means. If you can provide more information about where you encountered this word, I might be able to help you understand its meaning.