Funner? I love to see the evolution of words.  10 years ago people would've wondered where the hell you learned to speak. Now it's evolved into a regular thing. and why not? single syllable adjective that compare two things use "er" and "est"  big, bigger, biggest, tall, taller tallest. 

I'm still waiting on "good"    

man, that is soo much gooder, actually, it's the goodest. 