The phrase "major havoc" means a big and serious problem or chaos.
Sentences with «major havoc»
When this happens this causes major havoc for both the buyer and seller. (massrealestatenews.com)
Tomorrow: I don't expect a lot of inert loveliness in Takashi Miike's Yakuza Apocalypse, which is only screening once here, at an inconvenient time, and is therefore wreaking major havoc on my schedule. (thedissolve.com)
Of course, the severity of the accident plays a role in whether an occupant is injured in a car crash, but even a small fender - bender is capable of wreaking major havoc on a person's health and well - being. (davidchristensenlaw.com)