To be caught in one's own trap or to have one's plans backfire.
किसी के ही चाल में फंसना या अपनी योजना का उल्टा पड़ना
English Usage: The politician was hoisted with his own petard when his false allegations were proven wrong.
Hindi Usage: नेता अपनी ही चाल में फंस गया जब उसके झूठे आरोप गलत साबित हुए।
apni hi chaal mein fansna, apni hi chaal mein phansna, apni hi chaal main phansna, apni hi chal mein phansna
