"Total mayhem" refers to a situation of extreme chaos, disorder, or confusion. It suggests complete havoc or pandemonium where everything is in disarray and there is no control or order. Full definition
In fact, no exposure to live birds may create total mayhem if you throw them into an unknown bird situation! (working-retriever.com)
Know what they respond to and you usually can short - circuit total mayhem. (teach-through-love.com)
A game with remote controlled cars, two giant nets, one giant soccer ball and a small stadium to play in which was a recipe for total mayhem. (mammothgamers.com)