Acceptable to say that? Think so!
BackstorySo apparently yelling at my stepsister and telling her to "shut the hell up" before I hit her because she decided to 1. start laughing at me because I couldn't read something, 2 ask me if I was stupid, 3 say "oh so that's why you're quitting school, you're too dumb to go." and 4 keep asking how I got to high school is I was "too stupid to read" is justification for my stepmom to first try and ground me, then realize she couldn't so she convinced my dad to ask me to go to my uncle's for the night..
Did my step sister get in trouble? Not past, "Now Cy, it's not nice to say those things to people."