* It's a misspelling: There might be a similar-sounding word you're thinking of. Could you double-check the spelling?
* It's a regional term: It might be a word specific to a particular dialect or region. If you have any context about where you heard it, it could help narrow down the possibilities.
* It's a made-up word: It's possible it's a fictional word, a slang term, or a personal name.
Please provide more context so I can help you find the meaning of "khalulu"!