When you go to cook up some potatoes but you forgot what potatoes are and you think they are poisonous you don't cook or eat them and after a while they grow so big that the house explodes.
Try not to be potato forgetful today or this house will be no more.
Oh no, There was a dude that was potato forgetful today and made the building explode, Silly potato forgetfulness people.
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. PenguinBooks,1992. p. 38)