1) To be so extremely angry, that your anger can only be done justice by comparing it thunder.
2) Not any sort of normal anger, this is a special type of anger that people feel often when they get so pist that their words and sentences become incomprehensible or they begin to foam at the mouth.
1) I can't believe that cunt ass howler monkey gave us the test today, imma be thunderpist if I fail that shit.
2) What that ho said to me earlier got me straight thunderpist man, I'm surprised I didnt smack a tooth out that bitch's mouth.
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)