Ignofag
One who displays a baffling stupidity (or happens to disagree with your thoroughly researched viewpoint) by way of willful ignorance. Derived from the combination of ignorant and faggot
"I hate Coke Zero, nothing can top the original"
"Have you even tried it?"
"Of course not"
"You're such an ignofag"
"Have you even tried it?"
"Of course not"
"You're such an ignofag"