Dude, Mark got so shitfaced yesternight, I think he went home with that gay guy James.
on the night before today’s night.
John: where were you last night?
Luke: yesternight?
John: yes
Luke: Yesternight I was at home…
YesterNight, because yesterday is only for 12 hours, then it is night..
“Do you remember when we went to bed YesterNight?”
The 'last night' of yesterday.
Two nights ago.
The night before last.
Taylor: "The music video was due yesterday by noon; did you complete it in on time?"
Alex: "Yes, barely - I finished editing it yesternight."
or
Audrey: "When was your basketball game?"
Ella: "It was yesternight."
or
Miguel: "Did you see the movie yesternight."
Luke: "Of course, that was opening night."