be hoist with one's own petard

To be undone by one's own schemes.

Name	Pronounced	Usage
Bernhard	BERN-hahrt (German)	German, Dutch, Swedish, Norwegian, Danish, Ancient Germanic
GabriËL	KHAH:-bree-əl	Dutch
Juda	-	Arabic
Jean	[dʒi:n]
Morley	MAWR-lee	English (Rare)
Ahriman	AH-ri-mahn	Persian Mythology