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"But Aunt Marge suddenly stopped speaking. For a moment, it looked as though words had failed her. She seemed to be swelling with inexpressible anger — but the swelling didn’t stop. Her great red face started to expand, her tiny eyes bulged, and her mouth stretched too tightly for speech — next second, several buttons had just burst from her tweed jacket and pinged off the walls — she was inflating like a monstrous balloon, her stomach bursting free of her tweed waistband, each of her fingers blowing up like a salami…"
—Description[src]

The Inflating Charm[1] (Inflatus)[2] is a charm which inflates the target, filling it up with air until it floats above the ground.

In 1993, Harry Potter accidentally lost control of his magic, and used it on his Aunt Marge, who was inflated like a balloon after she nastily insulted his deceased parents. 

Harry Potter, Ronald Weasley and Hermione Granger used this spell on various creatures around the grounds of Hogwarts Castle throughout the 1994-1995 school year, under the authorisation of their Defence Against the Dark Arts teacher, Professor Bartemius Crouch Jr (who was disguised as Alastor Moody).

Inflatus

Harry Potter casting the charm to inflate a Blast-Ended Skrewt

Etymology

The prefix 'Inflate' derives from the English verb "to expand with oxygen".

Appearances

Notes and references

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