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Someone who is completely oblivious to the extent to which his/her words hurt another, due to his/her ignorance and self-centred, vainglorious, egotistical nature.
"Are you ok? You look like you wanna gouge someone's eyes out with a spoon..."
"I dunno...I need some fresh air. Amy's relentless with her cutting remarks without a clue what effect it's having."
"Don't worry...Amy's a fucknubbin."
"Yeah, there goes her wedding present - thanks Ross."
by Shoseph March 02, 2015
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