learned a cool new word today, thanks
the word selection was on purpose but the phrase was not, I just have a storm shelter (which I jokingly call the bunker) and likely mixed it up in my mind
makes me think of the reddit story about the guys dad would mix two idioms incorrectly on purpose (both things being malapropisms new from your link, related to malaphors which was new to me from that story)
I found one of the reddit posts I searched for afterwards
you have the knife, ‘equally’ means you get all the apples