Verbalized shrug

• Utterance from the unimpressed
• [ ___ ]
• Scoring low on the excite-o-meter
• 'Whatever ...'
• "It doesn't thrill me"
• Hardly thrilling
• Unimpressed utterance
• "Not a big fan"

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
expression of apathy or indifference, by 2003 (perhaps from 1992).

Wikipedia Word definitions in Wikipedia
Meh is an interjection used as an expression of indifference or boredom . It may also mean "be it as it may". It is often regarded as a verbal shrug of the shoulders. The use of the term "meh" shows that the speaker is apathetic, uninterested, or indifferent ...