What does it mean to be on a roll?

On a streak of success or intense activity, as in The team's scored three runs in the last inning and they're really on a roll, or Once the experiment succeeded, Tim was on a roll.

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Then, what is the meaning of idiom on the carpet?

: to criticize (someone) for doing something wrong He was/got called on the carpet for missing the deadline. What is the idiom of at the eleventh hour? If someone does something at the eleventh hour, they do it at the last possible moment. He postponed his trip at the eleventh hour.

Then, does not hold water idiom meaning?

phrase. If an argument or theory does not hold water, it does not seem to be reasonable or be in accordance with the facts. Are in the cards? If you say that something is in the cards, you mean that it is very likely to happen. Last summer she began telling friends that a New Year marriage was in the cards.

Can cut both ways?

Definition of 'to cut both ways. If you say that something cuts both ways, you mean that it can have two opposite effects, or can have both good and bad effects. This publicity cuts both ways.