A combination of an asshole and a noob. Someone who uses their incompetence to show dickheadedness behaviour.
Student: How come I didn't get marks for question 3 although my answer is correct?
Professor: You didn't use the same method I did, how do I know it's correct and you didn't just copy it from somewhere?
Student: What a noobhole
an adjective to describe one as being or in the state of being a noob.
Eric: Hey Colin check out my new puppy
Colin: Nah dude its only like 3 months old, its pretty noobious compared to mine.
Eric: Yeah, I guess you're right. Your so cool/good looking/smart/better than me!