FROTTAGE
frottage
(noun) masturbation by rubbing against another person (as in a crowd)
Source: WordNet® 3.1
Etymology
Verb
frottage (third-person singular simple present frottages, present participle frottaging, simple past and past participle frottaged)
To rub, especially to rub onto one surface placed upon another surface that is textured, in order to create a mottled or patterned area on the first surface.
(sexology) To rub parts of the body against those of another person for sexual stimulation.
Noun
frottage (countable and uncountable, plural frottages)
(uncountable, arts) A method of making an image by placing a piece of paper against an object and then rubbing over it, usually with a pencil or charcoal.
(countable, arts) An image so made.
(uncountable, sexology) The practice of rubbing parts of the body against those of another person for sexual stimulation.
Hyponyms
• (sexology): tribadism
Coordinate terms
• (sexology): frotteurism
Source: Wiktionary