Here's a good game: "stonily deny any knowledge of a person or cultural touchstone that you should, by virtue of your other cultural reference points, definitely be aware of." Some of my go-tos include:
John Updike, William Gibson, bongs, Russel Hoban, magical realism, trance parties, Crystal Maze, Charles Bukowski, Joy Division, Jack Kerouac, Italo Calvino, Guy Debord, The Mighty Boosh, Doctor Who apart from NuWho, Cory Doctorow, self-explanatory portmanteau neologizing, Hunter S. Thompson, Steve Jobs, William Burroughs, Brighton, Hegel, Rihanna, zombies (be aware of the word, but conflate with vampire), The Matrix, Bernie Sanders, The Big Lebowski, Stewart Lee, the word “hipster” (conflate with “hippie”), John le Carré, Alan Partridge, Glasto, Owen Jones, Margaret Atwood, Banksy, Martin Amis, Cormac McCarthy, the expression “grammar Nazi,” Samuel Taylor Coleridge, The Edinburgh Fringe Festival, Woody Allen, Kurt Vonnegut, Drake, millennials, Ursula le Guin, Vladimir Nabokov, Fight Club, Terry Pratchett, the expression “garbage person,” anything with "utopia" in the title, Girls, Gilmore Girls, Christmas jumpers, Blur, dubstep, Thomas Pynchon, The Green Party, Father Jack, Samuel L. Jackson, Cards Against Humanity, The “Žižek Game,” Common, Samuel Beckett, taxidermy, Just Jinjer, Theodor Adorno, insulin, The Unbreakable Kimmy Schmitt, search engines other than Google, burlesque, Wallace & Gromit, Jorge Luis Borges, social media other than Facebook and LinkedIn, stepcore, Lee-Ann Perrins, the transformative use exception in IP law, Prince, Verity Spott, Jay-Z, Muhammad Ali, the medical/health humanities, Terry Wogan, J.G. Ballard, Cilla Black, Monty Python, any Pokémon before Pokémon GO, Flann O’Brien, CrossFit, Slajov Žižek, Charles Kennedy, Francis Crot, Withnail and I, The God Delusion, Alasdair Gray, David Bowie (except that he died), Alan Hay, Inception, Radiohead, Maya Angelou, memes (always be more specific: “image macros”; “photoshopped images shared on Facebook”), the expression “grammar nerd,” Rosa Lyster, veganism, David Lynch, Jackie Chan, Morrisey, Lisa Jeschke and Lucy Beynon, CPR, The Toast, Salvador Dali, The Wire, Ernest Hemingway, The NHS, David Cronenberg, Afrika Burn, anarchism, steampunk, Nicolas Cage, Don DeLillo, bunting (this one’s good), China Mieville, Dungeons & Dragons, A Clockwork Orange. And the EU.