When Ben was only 3 years old (well over 20 years ago) we used to live in Boston, Massachusetts. One morning he had gone grocery shopping with his Dad and returned home with a large butternut squash. Coming from the UK I was not used to such exotic fare at the time, never having seen one before let alone eaten one - although they are not the least unusual now - and my reaction was "What on earth is that?" To which this tiny little boy replied "It's a blinkin' big mushroom!" Hence the name has stuck in our house.
And the point of which is tonight we are eating a favourite dish - Spicy roast blinkin big mushroom with cashew nuts and fresh pasta! Yum!