just about

Almost, very nearly, as in This job is just about done, or At just about midnight we'll uncork the champagne. This phrase is sometimes used alone, as in Are you finished yet?--Just about. It uses about in the sense of "nearly," a usage dating from the early 1600s.

The adverb has 2 meanings:

Meaning #1: (of actions or states) slightly short of or not quite accomplished; `near' is sometimes used informally for `nearly' and `most' is sometimes used informally for `almost'
  Synonyms: about, almost, most, all but, nearly, near, nigh, virtually, well-nigh

Meaning #2: (of quantities) imprecise but fairly close to correct
  Synonyms: approximately, about, close to, some, roughly, more or less, around, or so