A Latin and Italian word regarding male oral sex that is frequently confused with the more commonly used "fellare." "Irrumare" (person who does the act is an 'irrumator') refers to the person who offers the penis for sucking. The person who gives head (takes the penis into his or her mouth) is the 'fellator,' from "fellare". Modern terms like "sucker/suckee" or "bottom/top" don't cover the distinction so well.
by al-in-chgo May 03, 2011