Sentence:  The way his red rubber lips were stretched across his pearly little <WSD>teeth</WSD> I though he was only having a little joke , but , no , he wanted me to bend down from the roar of wind so he could roar something into my ear . 
Meaning of the word marked with <WSD> tags:  hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defense