I'm trying to find the origin of an expression we used as kids ... and unfortunately, I'm not quite sure if we got it right.

We said some form of   envoir ... or Omvure ... or homvoir ...

phonetically   ahm-ver    or   ahn-ver

that meant anything from 'shame on you' to 'that's bad' or 'I'm telling'

Any thoughts or suggestions on this? We were raised in Montana.