1 definition by FapDaddy
When two bros simultaneously penetrate both the vagina and anus of a single woman with their wankers, they become Siamese Eskimo Bros. Can also occur when both bros simultaneously insert their wankers into just one of said orifices, although this is much more difficult depending on the size of the talliwhackers and the diameter of the females vagina or anal cavity.
Jeff and Tom sealed their friendship when they double penetrated Sally by running train on her pussy and anus at the same, thus becoming Siamese Eskimo Bros.
by FapDaddy September 2, 2014