Number Five with a Bullet Lyrics

Lyric discussion by faketotheleft 

Cover art for Number Five with a Bullet lyrics by Taking Back Sunday

"Well just get dressed, don't do this" is the guy telling her that he's sick of waiting around for her and the get dressed part refers to sex rather than dressed to go out on a date or something. The guy is saying "just so you know when we get home we're through". He's just tired of playing around with her. Don't understand the title exactly, any thoughts?