When two people meet and one or both of them do not at first recall having met before, most frequently because of alcohol consumption but sometimes because one of the people just has a lousy memory. Although it is a second (or third!) encounter, they remeet as if for the first time.
"Hey, I'm Gavin."
"I'm Charlotte. Having a good time?"
"Ya, I'm friends with the DJ so I come out for these shows pretty often."
"You're friends with... Wait, weren't you at Mike's Hallowe'en party dressed as Duffman
"Ya that was me! That party was great, I was so crunk
"Oh me too, the last thing I remember was the guy in the gorilla suit breaking the light fixtures. Nice to remeet you!"
"Nice to remeet you too. Let's grab a beer!"