cut the ground from under feet

Meaning

1. cut the ground from under sb's feet

   to suddenly spoil sb's idea or plan by doing sth to stop them from continuing with it

From the same entry

• gain up ground
• get off the ground
• give ground
• go to ground
• hold your ground
• on the ground
• run yourself into the ground
• run into the ground
• thick on the ground
• keep your ear to the ground
• be on firm ground
• have your feet on the ground