Expelliarmus
From Tardis Wiki, the free Doctor Who reference
Expelliarmus is a magic spell frequently used in the Harry Potter series of books and films. It is a defensive spell, used to disarm one's opponent and block spells targeted at the user.[source needed]
Martha Jones used the word in an improvised verse against the Carrionites in 1599, after William Shakespeare was unable to come up with a suitable rhyme. (TV: The Shakespeare Code)