zwalać z nóg

Etymology
lit. 'to knock [someone] off [their] feet'.

Verb

 * 1)  to knock out, to knock for a loop, to pack a punch
 * 2)  to knock out, to knock for a loop, to pack a punch
 * 1)  to knock out, to knock for a loop, to pack a punch
 * 1)  to knock out, to knock for a loop, to pack a punch