Knock the props from under
verb phrase
To make a position, argument, opinion, etc, invalid; call into serious question: What he found out knocks the props from under her story (1910+)
Read Also:
- Knock the spots off someone  verb phrase To defeat someone decisively; clobber (1950+) 
- Knockwurst  [nok-wurst, -woo rst] /ˈnɒk wɜrst, -wʊərst/ noun 1. . /ˈnɒkˌwɜːst/ noun 1. a variant spelling of knackwurst 
- Knole  /nəʊl/ noun 1. a mansion in Sevenoaks in Kent: built (1454) for Thomas Bourchier, Archbishop of Canterbury; later granted to the Sackville family, who made major alterations (1603–08) 
- Knoll  [nohl] /noʊl/ noun 1. a small, rounded hill or eminence; hillock. [nohl] /noʊl/ Archaic. verb (used with object) 1. to ring or toll a bell for; announce by tolling. 2. to ring or toll (a bell). verb (used without object) 3. to sound, as a bell; ring. 4. to sound a knell. noun 5. a […] 
- Knoller  [nohl] /noʊl/ Archaic. verb (used with object) 1. to ring or toll a bell for; announce by tolling. 2. to ring or toll (a bell). verb (used without object) 3. to sound, as a bell; ring. 4. to sound a knell. noun 5. a stroke of a bell in ringing or tolling. /nəʊl/ noun 1. […] 
