Why am i always his target?

My dad always makes fun of me. Like tonight i was eating a snicker and i guess some of it was on my face and the he yells out, look at her face, doesn't it look like sh!it is on her face. Then the whole house laughed at me and he did too and all he had to say was "sorry but it did look like it was sh!t on your face" Then the house start back laughing and i ran in my room and cried. Then he start commenting on how messed up my hair looked and said i needed to comb it and again everyone starts laughing. i mean why does he do this to me? He does it all the time. why won't he grow up and leave me alone? And it gets really bad when my older brother is at home because then both of them double team and talks about me and laugh so hard and it makes me want to cry. All my dad says is "sorry honey, but your just too easy" How to get him stop, it really starting to make me feel depressed. I know i might sound like a baby but im sensitive and to have my own dad doing this make it worse.