Because I can say it's stupid, it must be stupid or shortly, it's stupid because I say so.
Ridiculing, belittleing, mocking the argument or the opponent.
"1+1=2! That's the most ridiculous thing I have ever heard!"
"Sure my worthy opponent claims that we should lower tuition, but that is just laughable."
"Support the ERA? Sure, when the women start paying for the drinks! Hah! Hah!"
"Those wacky conservatives! They think a strong military is the key to peace!"
"If the theory of evolution were true, that would mean that your great great great grandfather was a gorilla!"
"Nobody believes in socialism after college! Grow up!"
"Children shouldn't be given regular hearing tests, because hearing tests are stupid!"
"I imagine that someone like yourself would have no idea about how difficult this actually is."
"Supporting that cause would take several surgical trusses!"
"Those other cars look ridiculous. This is the only man's car here."
"Those clothes would make you look like a overdressed donkey."