I totally swiped this idea from Twitter: what can I say? It was funny! These are not in order because I'm including a couple I came up with and it seems cheesy to rank my own material against other Twitterers.

"Harry Potter and the mystery of the haunted girl's shower room." -- johnhawkinsrwn

"Harry Potter and the magical missing cats of the Chinese Restaurant." -- johnhawkinsrwn

"Harry Potter and the Friend That Never Gets To Second Base" -- ctj59

"Harry Potter and the Poorly Choreographed Fistfight" -- imao_

"Harry Potter and the Uncomfortable Backrub from Uncle Rob" -- shiverof3libras

"Harry Potter and the Gutters that don't clean themselves." -- sv0o

"Harry Potter and The Prisoner of Azkaban's Conjugal Visit!" -- kennybarlow

"Harry Potter and another movie where no one believes him." -- ChattaMatrix

"Harry Potter and the Awkwardly Aging Franchise Star" -- ninguna

"Harry Potter and The Less-Than-Satisfying Adaptation of a Novel" -- Nug13