I have literally never heard of any of these things. I know the undergrads have a very unique subculture here, which grad students aren't really a part of.
trolling - studying. A troll is one who studies a lot.
flicking - playing
3AM runs to Tommy's? - just fun thing to do, just because
The Ride - The Ride of the Valkyries was played, and only played, at the beginning of finals week. The KCAL radio station in Page House would play it, then everyone with a stereo would tune in so it was all synchronized all over campus, all at maximum volume. Playing it any other time meant you'd get tossed in the pond.
finesse - doing something artful and clever, like redesigning a motor to be more efficient so more torque is produced.
brute force and ignorance - the straightforward approach, like upping the voltage so more torque is produced.