What does you are totes bananas mean?

"You are totes bananas" is a slang expression that means "you are completely crazy." It is often used in a humorous way to describe someone who is acting erratically or irrationally. The phrase "totes bananas" is thought to have originated in the 1950s, and it was popularized in the 1990s by the television show Clueless. Today, the phrase is still used by people of all ages to describe someone who is acting crazy.