You don't need to add obscene stuff, you can just add any popular keywords in there, without them relating to ****. And if you are concerned about getting reported by youtube geeks you could just as well resort to popular words that simply vaguely relate to your video.
anime, card game, TCG, CCG, lolies, moe, video, games, movie, monsters, battles, podcast, vod, art, strategy, TBS, pvp, MMO
You could also add:
Kardashian, Gaga, Minecraft, UFO, Katy Perry, FIFA, Olympics, mail, twilight, wow, ghost, paranormal, drama, love
(and any other overrated popular crap)
and check my edited post, was editing when you posted T_T