Sentence:  'Thais in tights, I tell you,' he sniggers, his mind doing such an obscene variation of the <WSD>creepshot</WSD> he's just surreptitiously taken on his cell phone that I want to gag. 
Meaning of the word marked with <WSD> tags:  A surreptitiously taken photograph of a person (usually a woman) focusing on sexualized areas of the body such as the breasts, groin, or buttocks.