"Go one rocker" is a colloquialism used to describe someone who is behaving erratically or acting strange. There are many synonyms that can be used to describe this state, including "lose one's mind," "go crazy," "flip out," or "have a breakdown." Other expressions that convey a similar meaning are "go off the deep end," "lose it," "break down," or "freak out." These terms are often used to describe a sudden shift in behavior or a loss of control, and they can be used in a variety of contexts, from personal relationships to work situations and beyond. So, if you ever find yourself feeling a little "one rocker," remember that there are many words to describe how you're feeling!