Frotteurism | definition of frotteurism by Medical dictionary
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A paraphilia consisting of recurrent, intense sexual urges involving surreptitiously rubbing one’s genitals against a nonconsenting person. Frotteurism is particularly common in Japan, where it is known as chikan, and is regarded as a public safety problem, as it occurs on crowded trains, buses, elevators and at bike stands. Fondling the victim may be part of the condition and is called toucherism
in which there are repetitive sexual urges to gain gratification by rubbing against another person, often acted out in a public place. Called also frottage
Sexual gratification derived from rubbing a bodily area against another person, often a stranger, in an inappropriate way.
[Fr. frotteur, one who rubs, fr. frotter, to rub, + -ism]
Obtaining sexual arousal and gratification by rubbing one's genitals against others in public places.