1. Pursuing a baseless argument, arguing a point without evidence.
2. An assertion requiring no evidence and which ignores logic and reason.
3. An enormous gelatinous-octopus like creature with long bulbous eye-stalks, rows of sharp teeth, multiple tentacles, and no discernible skeletal structure.
This is just a load of Kweblar!
Your argument is Kweblar.
Run for your lives, Kweblar has eaten the Sky-Dome and is heading towards the suburbs!