Definition
"Certifiable" has two main meanings: 1) able to be certified, and 2) (informal) completely crazy or insane. In the first sense, it simply means something can be officially certified. However, in everyday language, it's usually used to describe someone's behavior as wildly erratic. It is like watching someone run around in circles screaming ðĪŠ. Think of it as the opposite of sane or reasonable. It implies an extreme departure from normal behavior.