Any character whose behavior is overly-flamboyant,
bubbly, and excessively enthusiastic in such a way that makes the viewer feel embarrassment.
Anime bullshit also pertains to any character who is acting way too serious opposite a sickeningly rosy character. This does not apply to all
anime and is not limited to Japanese animation.
Good examples include Tidus from Final Fantasy X or any of Misa Amane and Light Yagami's conversations in Death Note.