Is this abuse or am I just being dramatic?

So, my dad pushed me out of a chair yesterday because I jokingly called him short (he was in a good mood). He walked over to me and tilted the chair all the way over while I was eating and I fell to the floor, and I still can't move properly without it hurting, especially in gym class. When he gets angry he's said things like "What the duck is wrong with you?! No!" (This is when I forgot to put away stuff from lunch, I had a bagel), "oh, I'm gonna beat you...." (When I was having trouble ridding a bike he forced me to bring in front of my friend) and he's called me and my brother "little bastards". He doesn't do this too often, but he's been doing it more often recently. I'm 13 and I already have some personal problems going on inside of my mind (I suspect I have depression and I've been self harming) and he is making it a thousand times worse. I said "Thanks for pushing me out of the chair." After getting home from school today and he said "Thanks for being a smartass and making me." He's only apologized once for doing this. He never seems to regret it. Usually my mom is the one to say he didn't mean it. I don't know what to think of this. He isn't like this all to he time, no. He's usually quite happy and nice. But when he's in a bad mood or if my brother and I do anything wrong (not doing homework, not doing chores good enough, going against his opinion) he goes into a rage. Once my brother offered my dad a donut and I heard my dad ranting to my mom about how "Of course he didn't want a donut!" (Non sarcasm) Is this actually abuse or am I just being overly dramatic? Oh yeah, we're moving across the country this summer (7 and a half weeks) so I understand he might be a little stressed. We're getting the trailer this weekend. He likes to yell about how he spends money on things and works so hard for them and we waste it, for example, by using too many paper towels. Thank you for any advice or opinions. It's appreciated!