When your gay sexual partner sperm dribbles out of your anus after anus intercourse
Dave..I think I've just pissed out of my ass
John.. No its just ur bumcuming. Or should I say my cum out of ur bum
Dave.. Well least I won't get pregnant
by mitch00uk April 10, 2015
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BumCum is after your partner has ejaculated in your ass, and then Cum starts dripping outa his ass hole.
eewww, omg my bf fucked my ass last night and then started drinkin my bumcum.
by Rush April 12, 2005
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A translucent, beige, sticky, mucus created in the rectum by the body to help prevent log jams.
...so i ended up at her house and she opened a drawer full of toys but I had to pick the dried bumcum off her butt plug before we could use it...

I thought there was a monster turd brewing but I sat there for 15 minutes and only managed to fart out a teaspoon of bumcum.
by poxley March 26, 2010
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bumcum is actually the slick substance that you feel in your bum after you have done a lot of working on on a hot summer day.
I had mad bumcum the other day when I was running in gym.
by dankling September 29, 2006
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When you fill a bum hole full of your cum.
Guess what happened to Jennifer last night, she got bumcumed”
by Dalbby March 9, 2018
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BumCum is when you give your girl so laxatives and you wait til she gotta shit so you and 3 friends nut in her ass and then one of you get up close and let her shit it all out to make a stinky sticky liquid and you eat that shit up.
Last night me and the bois bumcummed in my girls ass lass night, and I ate that shit up homie.
by ReaperShadows February 28, 2021
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