I'm a dad of 4 kids (1.5 - 11) and my 11 year old has a stutter that I posted about to get some advice on how to best help and support him. I'm sorry you have a father who treats you like that - not in any way shape or form to excuse his behaviour, but just like you were tired and passed your bedtime, I would hope that his snapping at you was just venting frustration over over things in his life, but you would be the best one to judge that... though making fun of stuttering and downs syndrome is pretty low. You know your father better than anyone here - if this a pattern of behaviour there might not be much you can do other than to ignore or to tell him off - at your age you should be breaking out of the child/father relationship and treat him as a man, as much as he should be treating you same... and it's fine to call him out on it. Telling him how it made you feel might not do much as based on the paragraph above talking about feelings with him probably won't lead to much, but telling him he acted like an asshole is fine - it's not something you can help or do on purpose for attention and you are more frustrated by it then he is. Standing up for yourself for something unjust is part of adulthood - though there are many adults who avoid conflict you'll find the happier ones do know when to stand up for themselves so this could be a good opportunity to do so. If your father is mature and has a little empathy I would hope he would apologise