Obscenely pointy nipples, that look like circles with tubes in the middle. Originating from Hentai films, where nipples are only shown erect and unnecessarily pointy.
Ally has hentai nipples, I can always see them through her T-shirts even when she wears a bra.
Verb;
1. To cosplay a character unrelated to the convention/event's theme.
2. To cosplay an original character
Oni-chan is crash cosplaying an anime character to the gaming convention! He's so cool!
or
Do you think anyone will know who we are if we crash cosplay western comic characters to the anime con?