Cut the ground out from under (one) informal
To unexpectedly destroy one's plans or ideas, often by doing something better than them or before them
Team A cut the ground out from under team B and eventually won the debate.
The governor cut the ground out from under the news agencies by his clever answer.
If you say that you carry all before you, you mean that you successfully defeat all of your opponents in a battle or a competition.
The best person or the best thing of a group in which none is good.
The best or the most excellent
To deteriorate.
The verb "cut" should be conjugated according to its tense.