How to apologize to my dad?

Hello. Recently my dad got reallllllllly mad and now he is ignoring me and my 2 brothers. he got mad because he got tired of our bickering and he thinks were disrespectful. so he pretty much exploded during dinner O.o so my big brother apologized first and my dad ignored him now my other big bro apologized and got the same reaction from my dad. both of them were ignored so i've just been keeping my distance from my dad. also i didn't think my dad was mad at me because he was complaining about how my brothers always are disrespectful. but today i overheard him talking to my mom about how i am being a spoiled brat and not apologizing. i just thought to give him some space but now he's mad at me for not apologizing :C i hate this. i don't know how to apologize now because im sure he's gonna ignore me like he did my brothers. he's soo stupid sometimes >:l