Crap isn't a bad word. Once I got into 6th grade, I heard the f-word on a daily basis. Should you say it? Well, that's up to you. You get in trouble if adults catch you saying it, but it depends on how you want other people to see you. My mother cusses a LOT and people see her as rude and short tempered. My dad doesn't cuss and he's viewed as a calm and knowledgeable person. Be who you want to be. Don't let other people change you, but be knowledgeable on how you want others to view you. I don't know if this makes sense to you, but I hope it does.
Still, this is my fiddler crab. Kamikaze says to be happy. xD he just molted a few days ago for the first time since I've had him (a month). :3