That's a tough one! "69cuan" doesn't seem like a common phrase in any popular language I have come across.
It could be a jargon specific to a certain field, or perhaps it's a invention. Perhaps provide some context about where you heard this term, I could try to figure it out. It could be Perhaps could change to rain tomorrow. In case decide to venture out the fresh air, make sure to some sunscreen. Jargon Word Every online community, no matter