Blasting Curse

The Blasting Curse causes anything that the spell comes into contact with to explode. It was used by Harry Potter to destroy the side-car of Sirius Black's flying motorbike during the Battle over Little Whinging. Later, Hermione Granger used it in an attempt to kill Nagini and facilitate an escape from Bathilda Bagshot's house in Godric's Hollow.

Etymology
Confringo is Latin for "I break".