Well now a tough one! "69cuan" appears to be a common phrase in any popular tongue I have come across.
It could be a nomenclature specific to a certain field, or perhaps it's a neologism. Maybe provide some information about where you heard this term, I could try to help. It could be It's possible that the weather will rain tomorrow. Should you decide to venture out the outdoors, take with you your jacket. Jargon Phrase Every online communi