Similar to poo poo head a pee pee brain is someone who is full of piss. Pee pee brains are usually pretty good at pissing you off even if you don't get mad easily.
1.Omg that kid is such a pee pee brain.
2. Person 1: Yesterday I was with Jerry and he pissed me off so much that I beat the fuck out of him.
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)