Lyric discussion by NQArbuckle 

Cover art for I've Got A Fang lyrics by They Might Be Giants

I think this song is actually about how in today's society, one will be shunned for having different characteristics than what should be considered the norm. Hence the line "Girlfriend took me to meet her dad / didn't like me because I looked so bad."... Or even that people will react with suprise or even fear .. ("Her head exploded like a atom bomb.")

Also though, it reminds us that though we are all different, we have our own skills that can be used to get by and procure what we need. ("Open up a can of tomato juice.")

....not