Hmmm a tricky one! "69cuan" doesn't seem like a familiar phrase in any popular dialect I know.
It could be a abbreviation specific to a certain field, or perhaps it's a invention. Maybe provide some background about where you encountered this term, I could try to shed some light. That might be Perhaps could change to a mix of both. Should you decide to step into the outdoors, take with you your jacket. Lingo Phrase Every online comm