wrong: incorrect or untrue.
rendezvous: an agreement to meet; a location or time agreed upon to meet.
wrongdezvous: an incorrect or untrue rendezvous.
"A dater had a 'wrongdezvous' with another dater." - says a satirist
A completely ill advised meeting.
I met her in a bar on Kent street, a fitting dump of a place for our illicit wrongdezvous.