When you grab handful of semen and squelch it between your fingers and displace it into an orifice as lubricant. e.g A vagina or butthole
Open up here comes the cum fist!
by cumfist OG October 23, 2017
When one man proceeds to cum into the anus of another to which he follows up by fisting the asshole using semen as lub.
While on the bus Joshua exclaimed to his friend Jennifer, I'm not huge on anal but I'd be up for cum-fisting all night.
by Tsx Weasel March 14, 2016
by Gemini2017 April 18, 2017
by Gemini2017 April 18, 2017