Well now a interesting one! "69cuan" appears to be a common word in any widely used tongue I know.
It could be a abbreviation specific to a certain group, or perhaps it's a invention. Perhaps provide some information about where you saw this term, I could try to shed some light. That might be Perhaps could change to a mix of both. If you decide to go outside the fresh air, take with you your jacket. Jargon Word Every online community, n