go ape

1. Become wildly excited or enthusiastic. For example, The audience went ape over the band. This idiom is a modern version of the older go berserk. It fancifully equates frenzy with an ape's behavior. [Second half of 1900s] Also see go bananas.

Related Words

• babble 
• freak out 
• fume 
• go crazy www.thesaurus.com
• rant