When you piss around the wall of the toilet, trying to not hit the water to make little noise. Most people do this cause they're insecure about their pissing.
When someone is overly pissed off and decides to yell at everyone, even when they're trying to help.
Guy 1: What the hell do you want? You're not helping me!
Guy 2: Woah, dude. Don't be such a Pissy Pants.
Guy 3: Yeah. It looks like You Pissed Your Pants.
Pissed off Angry Pissy Pants/You Pissed your Pants
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)