A person who tends to be very grumpy, due to a lack of sleep, and or taking naps are the most bizarre times. Mostly happens to teenagers, and gets worse as it develops. There is no real cure, besides to actually get some sleep. Grinchides can also happen when you get very sleepy at night, and the next morning/day you are very grumpy, annoying, and sometimes toxic. Not a real disease tho it should be treated as one. Can be contagious but very rare for that to happen.
"Stay away from Aiden, looks like he's got grinchides"
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)