be hoist with one's own petard

To be undone by one's own schemes.

Name	Pronounced	Usage
Gautam	-	Indian, Hindi, Marathi, Bengali
ÖDÖN	-	Hungarian
Karp	KAHRP	Russian
Shyam	-	Indian, Hindi, Marathi, Telugu, Malayalam, Tamil, Kannada, Bengali, Nepali
Brenda	['bendə]
Balfour	-	English (Rare)