Bat-Bogey Hex

The Bat-Bogey Hex (incantation unknown) is a spell that causes the victim's bogies, or boogers, to turn into bats and attack him or her. Ginny Weasley was a noted practitioner of the hex, and used it to good effect on two occasions. The first use was to overpower Draco Malfoy in Dolores Umbridge's office during her reign as Headmistress of Hogwarts, allowing her to escape (along with Ron, Neville, and Luna). The second mention of use of this spell was on Zacharias Smith who annoyed Ginny on the Hogwarts Express by asking her exactly what went on in the Ministry of Magic the night they went there. The second use gained the attention of Horace Slughorn, who invited Ginny to take lunch with him as part of his Slug Club.

Appearances

 * Harry Potter and the Order of the Phoenix (First appearance)
 * Harry Potter and the Half-Blood Prince