What is open up a can of woop ass?

"Open up a can of whoop ass" is a colloquial phrase that means to unleash a great deal of force or energy on someone or something, usually in a confrontational or aggressive manner. It's an expression that gained popularity in the 1990s and has been used in various forms of media. The phrase is often associated with professional wrestling and action movies. Furthermore, it is regarded as a slang term for physical assault or to beat up someone.