No Great Shakes Meaning

(idiomatic) Unexceptional; not special or noteworthy; not very effective.

Example: 1898, Gertrude Franklin Horn Atherton, The Valiant Runaways, ch. 19,
  You're welcome to stay here, but this hut ain't no great shakes for such as you.
2008, "Your definitive guide to the iPhone," The Times (South Africa), 24 Aug. (retrieved 31 Aug. 2008),
  The iPhone’s 2.0 megapixel camera is no great shakes, but it’s good enough as cellphone cameras go.