not up to scratch and not up to snuff

not up to scratch

Not acceptable or satisfactory; not attaining a particular standard. Your papers have been very good all semester, but, frankly, this one is not up to scratch.
See also: not, scratch, up

not up to snuff

Not acceptable or satisfactory; not attaining a particular standard. Your papers have been very good all semester, but, frankly, this one is not up to snuff.
See also: not, snuff, up
Farlex Dictionary of Idioms.

not up to scratch and not up to snuff

Fig. not adequate. Sorry, your paper isn't up to scratch. Please do it over again. The performance was not up to snuff.
See also: and, not, scratch, snuff, up
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • not for a second
  • not for a minute
  • not for a moment
  • aint
  • ain't
  • not for a/one minute/moment/second/instant
  • not for a instant
  • be not much cop
  • by no means
  • not by any means