Definition of "first-nighter" [first-nighter]

• Someone habitually a spectator at the openings of theatrical productions (noun)

WordNet. Princeton University. 2010.

• ""The wonderful part of his work was the fact that he was able to tell the very simple story of distillation ... with a lot of style and with his iconic metal work voice," commented first-nighter Cedric Suming."
• "It will almost certainly be a "first-nighter," possibly with some SF-related lyrics thrown in."
• "The first-nighter was thrilling, but the show quickly slumped in the weeks that followed as the shtick failed to stick."