The title characters are a reference to Nick and Nora Charles of "The Thin Man" films.
"fistful of assholes"
"the neverending story" mentioned in dialogue
When Norah is in the bathroom stalls looking at the "Where's Fluffy?" writings, a sticker of Beavis and Butt-head can be briefly seen
Subject of an $8,000 question
Mentioned by Jimmy when introducing Kat Dennings
Seth and Kat Dennings talk about the movie they did together, and Seth shows two stills