Adj: a dude/tte who is reckless, over-spontaneous, and extremely impulsive; tends to be like dynamite, unsafe and dangerous.
dude1: holy shit! dude! watch the fuck out! you almost hit that car!
dude2: chillax bro, were safe now, nothing to worry about
dude1: fuck that, let me drive, you're too much of a dynamitehead.