A person who "troubleshoots" problems while taking a shit.
Can be done with a laptop computer, or simply a smart phone
Person1: Hey! 'Person3' fixed my debug error while taking a shit!
Person2: Wow! you're a troubleshitter?
Person3: That I am young one.
The act of surfing the web while using the toilet usually done with a laptop almost never a desktop computer.
(Guy1 holding a laptop walks up to Guy2)
Guy1: I was on the toilet reading your article and-
Guy2: On the toilet?
Guy1: ...Yes I Sit N' Surf