un·be·known·sties | un·be·known·sti·er | un·be·known·stie·st
noun
A lack of awareness of current events, commonly used with “a case of”.
“I had a really bad case of the unbeknowsties the other day when I left my cell phone at home and couldn’t read the news.”
“She must be the unbeknownstiest girl I know — she wasn’t even aware that Trump underwent prefrontal cortex reduction surgery.”