Sentence:  One of the oddest spectacles in America, in fact, has to be a Tom Jones audience, in which a couple of dozen women, usually attractive and well dressed, throw their panties onto the stage and compete for what appears to be a deep kiss from the male master of the <WSD>bump and grind</WSD>. 
Meaning of the word marked with <WSD> tags:  A sexually suggestive dance involving exaggerated hip movements, especially a striptease dance.