It can be used to describe someone who is:
* Clumsy
* Silly
* Stupid
* Unintelligent
* Naive
* Lacking in common sense
The word's origin is unclear, but it's likely derived from the name of a famous clown, "Bozo the Clown". This association contributes to its meaning of someone being silly or lacking in intelligence.
However, it's important to note that using the word "bozo" can be offensive and derogatory. It's generally best to avoid using this term, especially when referring to someone directly.