Frottaging

A type of perverted sexual solace performed by men against completely innocent members of the public, often in full view of their compatriots. It is normally associated with inverted men, but can also be performed by normal males against females. An inverted or normal man will select his frottaging ‘victim’ in, say, a crowded train, and approach them in as innocent a manner as possible. They will then rub their genital area or loins against them in an act of simulated sex before making off as quickly as possible. Most disgusting. Young ladies have also been victims to this disgraceful practice, and I urge you all to be very wary of young men who approach you in public areas!

frot, tribadism, dry humping, or any other no-penetration body grinding done with or without clothes in public or in private

1: The act of grinding one's body against another for sexual pleasure with clothes on.
2: The less known definition of applying a texture to a piece of paper through rubbing.

When 2 guys rub their dicks against each other.
It's kind of hot :3
Usually you wear clothes.

To induce a sexual pleasure by applying one's body to another's. The process may occur in an undulating motion or during general perambulation. The process is especially popular at music concerts and at night clubs see moshing.

Frottage is often referred to as Dry Humping.

Rubbing the cock with another cock to blow a wad. It usually ends up in a big ole mess of cum.

To rub body parts or items together in a sexual manner