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

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.

to rub your clothed body against another person for sexual pleasure, without their knowledge

The act of humping another person through both of your clothing. Often used by lesbian lovers as well as straight people at clubs.

The sacred 'art' of Frot or Frotting.

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

dry humping cock rubbing etc