ooh la la

exclamation2

1. •
   (informal) An exclamation of surprise, sometimes with strong sexual connotations.

   • Ooh la la, monsieur, you do have big muscles after all.
2. •
   A reply implying pretentiousness; often in response to another person's use of a big word, especially a loanword that English got from French.

   • Oh, they were serving croque-monsieurs, now were they? Ooh la la.