It's possible that:
* It's a made-up word: Someone might have created it for fun or as a fictional term.
* It's a misspelling: Perhaps the intended word was something else entirely, and there was an error in typing or writing.
* It's a code or cipher: It could be a coded message that requires deciphering.
Without more context, it's impossible to determine what "pietrisycamollaviadelrechiotemexity" might mean. If you have any more information about where you encountered this word, it might be helpful in understanding its purpose.