When somone puts their arm down the piping of the toilet to find a shit. This is usually performed after somone else has just been to the toilet, obviously increasing the chance to find something.
There are many reasons people do shit fishing, but the three most commen reasons are:
Blocked toilet
Somone ate something that the person needed
Hunger
"Hey John, wanna play some b-ball on saturday?"
"I can't Stan, I'm going Shit Fishing with my dad."
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)