"The incantation for the knockback jinx is 'Flipendo' .This jinx is the most utilitarian of Grade 2 spell, in that it will allow the caster to 'knock back' an opponent or object and can also be used to push and activate certain magically charmed switches. Like many Grade 2 spells, Flipendo can be targeted."
The Standard Book of Spells, Grade 2

The Knockback Jinx[2][1] (Flipendo[2][1]) is a jinx that can be used to physically repel an opponent, knock away an object, blast apart fragile objects and active magically charmed switches[2].

It is covered in both Quentin Trimble's The Dark Forces: A Guide to Self-Protection[1] and Miranda Goshawk's The Standard Book of Spells, Grade 2.


This jinx was taught by Professor Quirinus Quirrell to his first year class in 1991; they later used it to defeat the various imps, fire crabs, and pixies residing in Hogwarts Castle, as well as helping to protect themselves against the monsters in the Forbidden Forest[3].

In the second year, students learn how to charge up the spell to more powerful levels (without casting the variations). To do so, one must hold their power in their wand and release their magic when the blue spell turns a strange purplish-red colour. Past this point, the spell will backfire in mid-cast, or fly back to the caster, damaging them somewhat.


The Knockback Jinx feels like a blow to the chest, knocking its victim back,[1] along with "a loud bang."[4]


The Knockback Jinx can be rebounded to its caster by means of the Shield Charm, as many other spells can, or simply dodged.

Known uses

"There was a loud bang and he felt himself flying backwards as if punched; as he slammed into the kitchen wall and slid to the floor, he glimpsed the tail of Lupin's cloak disappearing round the door."
—Lupin uses this on Harry.[src]
Caster(s) Date Notes
Harry Potter 17 December, 1992 Professor Gilderoy Lockhart revised this with his second year class in the 1992-1993 school year for use in duelling.[2] He then had Harry Potter and Draco Malfoy duel each other with it.[2]
Severus Snape June 1997 Used this jinx on Harry Potter when escaping Hogwarts Castle alongside the Death Eaters[5].
Remus Lupin 1 September, 1997 On 1 September, 1997, Harry had this spell used on him once more, this time by Remus Lupin at 12 Grimmauld Place[6].
Dobby 30 May, 1993 After Lucius Malfoy realised that Harry Potter freed his House-elf with his sock, Dobby cast this on Malfoy as he was about to curse Harry. This was accomplished by House-elf magic, without a wand.[7]
Draco Malfoy 17 December, 1992 Professor Gilderoy Lockhart revised this with his second year class in the 1992-1993 school year for use in duelling.[2] He then had Harry Potter and Draco Malfoy duel each other with it.[2]
September, 2020 Used in a Duel against Harry Potter in the latter's house.[8]
Alastor Moody 18 June, 1996 During the Battle of the Departments of Mysteries, Alastor Moody used this jinx to knock a Death Eater off the ground and hit a large rock before disappearing behind it.

Known practitioners

Behind the scenes


Notes and references

Defence Against the Dark Arts (D.A.D.A.)
Professors: Galatea Merrythought · Quirinus Quirrell · Gilderoy Lockhart · Remus Lupin · Barty Crouch Jr. (as Alastor Moody) · Dolores Umbridge · Severus Snape ·
Amycus Carrow (as Dark Arts teacher)
Textbooks: The Dark Forces: A Guide to Self-Protection · Break with a Banshee · Gadding with Ghouls · Holidays with Hags · Travels with Trolls ·
Voyages with Vampires · Wanderings with Werewolves · Year with the Yeti · The Essential Defence Against the Dark Arts · Defensive Magical Theory · Dark Arts Defence: Basics for Beginners · Confronting the Faceless · Magical Drafts and Potions
D.A.D.A. at Hogwarts: Classroom 3C · Temporary Classroom · Hogwarts Turris Magnus · Professor's Office · Storeroom · Staircase · Lesson Cup · Race Cup · Dumbledore's Army
Spells covered under the subject: Curse of the Bogies · Knockback Jinx · Verdimillious Charm · Verdimillious Duo Spell · Verdimillious Tria · Wand-Lighting Charm · Freezing Spell · Seize and Pull Charm · Patronus Charm · Killing Curse · Cruciatus Curse · Imperius Curse · Impediment Jinx · Reductor Curse · Stunning Spell · Shield Charm · Nonverbal spells · Hex-deflection ·
Hex-Breaker · Hex Zapper
Creatures covered under the subject: Vampire bats · Iguanas · Cornish Pixies · Werewolves · Vampires · Hinkypunks · Boggarts · Red Caps · Kappas · Grindylows · Inferius