When it comes to expressing an enthusiastic and wild behavior, "go nutty" may not always sound appropriate. Luckily, there is a wide range of synonyms that can be used to express the same idea in a more appropriate way. Some alternative phrases include "go crazy," "go berserk," "lose your mind," "freak out," "go bonkers," "get wild," "flip out," "go bananas," "get nuts," and "let loose." All of these phrases can be used interchangeably while expressing an unreserved, passionate, and enthusiastic attitude. The key is to use the one that fits the context and tone of the conversation.