Should I jump my brother?

My brother is the biggest @$$ hole!! He's always a jerk, a D-bag, and is the BIGGEST hypocrite and a narcissist!! Also he broke my new cell phone and freaked out ALL because i wouldn't let him use MY xbox! Hes turning 19 this month and im 17. Just now for NO reason at all he said "the second you turn 18 im going to beat the $hit out of you!". My friends and I could jump him at ANY moment and he wouldn't see it coming. I don't want a mushy speech about how hes my brother and I should be nice to him, there's NO getting through to him!!