The default picture used by over 84% of users of the popular networking site myspace (See definition #4).
-Man, she looks fine!
-Can't you tell? That's a horrible pixelated shot of an underdeveloped highschool freshman in their underwear trying their best to make a seductive face, dude.
by cchriss92 August 8, 2007
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When your IQ is apparently 'lower than current age standards' of your peers in your age group.
In short, nonsense about your IQ and how dumb you are.
Me : "According to my test IQ results, I have 'IQ underdevelopment'."
Human 2 : "Now, why isn't that surprising mate "
Me : F*** you !
by Cloudyshadow October 31, 2017
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