A fork of Rural Dictionary
The condition present after screwing a grandmother. Symptoms include smell of mold, cobwebs, maggots and/or spiders, perhaps even old trash such as condom wrappers caught in the cock-must related debris. Can also be contracted from intercourse with attics, corpses, or antiques.
After a week at grandmama's, I was diagnosed with a serious case of cock-must.
Fecal matter composed entirely of semen.
You're sitting in church four days later, and you think you're farting, but it's really shit-cum. And those are your Sunday pants too. Damn.