A combination of 'Neek' and 'Retard', relating to the shameful, unfunny, lousy, just plain embarrassing things people say or do. Sometimes it's considered cool to be a Nee'Tard, if in the sense you make people laugh at your 'Nee'Tardedness' - so your either mad funny or an actual 'Nee'Tard'. You've been warned.
A boy walks into school with ankle swingers. Some kids shout at him;
"You're a Nee'Tard!"
GIRL 1: "Yesterday I farted in my sleep!"
GIRL 2: "Eurgh, gosh you're such a Nee'Tard!"