A person age 13 or over who is loud and stupid and often has no idea what they're railing about or what they're getting themselves into.
"Josh is not an obnoxtard because he knows what he's talking about!"
by Corridor March 26, 2010
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A child age 9-12 who is loud and stupid and has no clue what they're actually railing about or what they're getting themselves into. Not used in children under 9 because that is normal child behavior.
"Blake is such an obnoxtard!"

"No, he's 12 so he's a jr. obnoxtard ya idiot!"
by Corridor&Bran March 26, 2010
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