What does lachflash mean in English?

"Lachflash" is not a recognized English word. It seems to be a misspelling or a made-up word.

It's possible you meant:

* Flash - A sudden burst of light or a brief moment of something.

* Lachrymose - Characterized by or given to weeping.

* Lachrymal - Relating to tears or the tear ducts.

Could you please provide more context or clarify what you meant by "lachflash"?