What does "ahoge" mean

アホ毛 ahoge is simply a stupid piece hair or "idiot hair"

The image:Utatane Piko, is The first Vocaloid from Sony Music Distribution from the Vocaloid2 engine. He was released on December 8, 2010. Not sure what Vocaloid is all about

checkout Rendered Beauty post on Vocaloid

Anime: What does "ova" mean?

Also oav, short for original video animation, animated films and series released direct-to-video, without prior showings on TV or in theatres.  The term OAD (original animation DVD) refers to DVD releases published bundled with their source material manga.

History and format available from Wikipedia