A person who gets so overly hyped up about something, all they can do is squeal and wave their hands furiously. Also known as a fangirl, encouraged by the thought of their favourite subject of choice.
"Look at that squeetard! It's amazing, how they can still breathe while squealing that high. It's only Johnny Depp/Naruto/something...."
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. Penguin Books,1992. p. 38)