sissygasm

Etymology

sissy + -gasm

noun

1. (slang, vulgar, rare) An orgasm reached solely through penetration of the anus, rather than by stimulation of the penis or clitoris.
   Sissification also involves mind control through erotic hypnosis in which the sissy-in-training watches videos that glorify the process of worshiping giant cocks that put the would-be sissy’s pathetic little “clitty”—i.e., tiny penis—to shame. He is sternly instructed to gain sexual satisfaction from prostate stimulation rather than penile stimulation and is trained to achieve “sissygasms” by either sitting on dildos or being fucked in the ass. 30 April 2018, Jerome London, “The Art Of Sissification: Is ‘Sissy’ A New Sexual Orientation?”, in Thought Catalog, archived from the original on 2021-01-25
   Google sissygasm. Teasing around their butt with your fingers or a vibrator will help. The goal is to have them only cum from anal stimulation. If you have to, make them wait another week if they can't do it without vibrating their[…] 2019-05-04, Scott Barry, 609 Pages of Horse Shit, Lulu.com

verb

1. (intransitive, slang, vulgar, rare) To reach orgasm solely via penetration of the anus, without stimulation of the penis or clitoris.