When someone makes an argument that sounds compelling, but is actually just based in wordplay and not logic.

Examples of Rhetoriculous statements:
"If you can take a dick you can take a joke" (excuse for homophobic jokes)
"If you don't stand for something you'll fall for anything" (there's no correlation between having passion for something and being immune to trickery. If anything, the opposite.)

A polite term for shoving a lubricated probe into the Earth's hole to release gas.