be on pins and needles

be on pins and needles

  (American & Australian)
to be nervously waiting to see what is going to happen We're on pins and needles waiting to hear whether she got the job.
See also: and, needle, on, pin
References in classic literature ?
She went with her mother, who, of course, when she heard of a stranger being in the neighbourhood, would be on pins and needles till she had seen her and got all she could out of her.