go a little nuts = go a little crazy

When you go nuts ,you go crazy ,frustrated or disoriented. When you go a little nuts, you become very upset ,you act foolish and silly or in general you show irregular disoriented behavior,the exact description of the behavior will vary with the context.

go a little nuts= act in a silly fashion. Example: When the boys won their basketball match, they went nuts and threw their coach in the air.