A boy/girl that ruins the fun of the others, to be a killjoy or to simply be annoying
"Yo, stop being an assmuncher and enjoy the party."
A badass guy, a guy kicking asses, a dude that loves action
"That man is a kickass! Look at him fight the bouncer!"
A guy/gal that acts like she owns the world, to be annoying and pretend like you own the world yourself.
"Take your stupid ClassyAss out of this place and never come back."