Sentence:  Half an hour later, she was staring at a large bottom-<WSD>cleavage</WSD>, which was protruding from under the bed. / 'Ohhh Kayyy. Here we go. This is basically your problem.' / Olivia took a few steps back as the bottom-<WSD>cleavage</WSD> started wriggling out towards her. Connor the counter-surveillance expert pulled himself awkwardly to his knees, ... 
Meaning of the word marked with <WSD> tags:  Any similar separation between two body parts, such as the buttocks or toes.