I've recently asked this question regarding the anime Anime de Wakaru Shinryounaika. I've used the tag anime-wakaru-shinryonaika, since using the full title would go way over the 25 character limit. So I had to cut the "de", which wouldn't be too much of a problem, IMO. However, I also had to cut a "u" from the last word, turning "shinryounaika" into "shinryonaika".
This is probably fine, since we can't do much about the character limit, but I just thought I'd check if anyone know about any shorter version of the tile I'm unaware of — like "oreimo", "watamote", "waramete" and so on — or a better alternative for the tag.