kum Share definition Flag 1. Slang, misspelled word for orgasm 2. Semen 3. The first part of the name of a gas station in Iowa Kum & Go. Dang, he got kum all over me when I made him kum. Better get to the Kum & Go for some wipeys. kum by Girliebabe6 August 18, 2006 Get the kum mug.