While having sexual intercourse (from the front) deliver a deadly blow to the abdominal section of your fellow mate, thus causing his/her to lose their breath. After your mate curls and grabs his/hers stomach, slap them in the face and scream CHALUMPA!! (cha-lum-pa)
It is the act of receiving Cunalingus while defecating. The act can be completed by either sex, depending on recipients orientation. Synonyms: Reverse Blumpkin; The Charlie Sheen Experience
I took that guy home from the club, but when i got home I had to shit really bad but couldn't wait, so i made him give me a cunalumpkin to kill two birds with onestone.
Person one: hey have you heard about presleys party? god talk about a chalumpa.
Person two: nah i can't go i'll be too busy on /b/
Person one: ... /b/tard