Basically, if it makes zero sense and defies the laws of physics, it can be construed as troll science.
For example: Gluing thousands of magnets to the front of your car, and harnessing another large magnet to be held stationary directly in front of your car. This should pull your car forward, and you'll never need to buy gas ever again.
Not quite, but it sounds good in theory...
Here are some classic Troll Science memes from the internets:
|This makes me want to strap buttered bread onto my cat...|