A person who gets so overly hyped up about something, all they can do is squeal and wave their hands furiously. Also known as a fangirl, encouraged by the thought of their favourite subject of choice.
"Look at that squeetard! It's amazing, how they can still breathe while squealing that high. It's only Johnny Depp/Naruto/something...."
by Citronic September 04, 2008