Vacuous

Pg 46 ...." vacuous bursts of laughter rose toward the summer sky".

Definition: purposeless; idle:
Forms of Word:vac·u·ous·ly, adverb
vac·u·ous·ness, noun
non·vac·u·ous, adjective
non·vac·u·ous·ly, adverb
non·vac·u·ous·ness, noun
un·vac·u·ous, adjective
un·vac·u·ous·ly, adverb
un·vac·u·ous·ness, noun

"While He’s Just Not That Into You dared to ponder a question or two about the nature of romance in the digital age, this vacuous mess doesn’t have a single idea in its head".
http://www.collider.com/2010/05/23/valentines-day-blu-ray-review/

But the show had slipped in the ratings; indeed, its demise was probably a foregone conclusion when its producers started burdening it with vacuous left-wing political themes.

Read more: http://www.nypost.com/p/news/opinion/editorials/law_order_fadeout_lMkLvPB6kfemccrPYX9hhK#ixzz0os2QKyqA