the phrase "lavda lasun" doesn't have any widely known or specific meaning in English or any other mainstream language. It's possible that it could be a term or slang that emerged or is used in a specific regional or cultural context that I am not aware of.
Please note that language is constantly evolving, and new phrases and slang emerge over time. If "lavda lasun" has gained popularity or significance , I wouldn't have any information about it.
If it's a phrase from a specific region, culture, or community, it might be better to ask someone familiar with that context for a more accurate explanation.