“At arm’s length”

“Dead set against”

Strongly opposed to something.

“At a glance”

After a quick look.

“Cut both ways”

To have both positive and negative effects.

“Draw a blank”

To fail to remember or find an answer.

“Fall flat”

To fail to have the intended effect.

“At loggerheads”

In strong disagreement.

“At all costs”

No matter what happens or how difficult it is.

“Keep at bay”

To prevent something from coming close or becoming a problem.