Lyric discussion by Occams_Harmony 

Cover art for Half a Heart lyrics by Barenaked Ladies

I'm think it's about someone who is half despicable and half pitiable. People might feel sorry for him and try to help him, but if they really thought about it, he's a pretty bad guy and he's done some bad things and he's not reliable and so if you really thought about it, you'd probably let him drown, because he's really not worth saving.