The act of two individuals rubbing together their penises for the sake of mutual sexual stimulation. Several distinct frotting positions exist, with the common through-line of penises being in relative contact with each other and being rubbed. Notably, frotting does not actually require direct contact between penises as some thin layering of clothing may be acceptable. Verbiage is most often used by transfeminine individuals, femboys and traps, or even by male gooners and heavily relates to bottom culture.
"I think frotting with some girls would fix me tbh..."
"Me and Chriz were frotting in the van for hours last night."