The thing that equals instant humor in someone's mind.
Usually, when a meme becomes a personal funny, it becomes nearly immortal in that person's mind.
Person 1: Amogu DDUDUDUUDUDUDUD! HEHEHAHAHAHOHOHEAHEA
Person 2: Why do you think that's so funny?! That meme is so dead!
Person 1: Sorry but it's my personal funny.
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)