(noun): A deposit of fecal matter containing large amounts of mucus. Muoop is distinguishable for: foul smell, gooey clean-up and infamous toilet after stick. If Muoop persists consider medical consultation as it may stem from Cystic Fibrosis. Comes from Greek "Pooponium Mucosus"
Charles: Golly gee, I just vandalized that toilet with some Muoop.
Sara: Damn you after stick! I'll get the bleach.
Johnson: Hm, I haven't had a good muoop in ages.
Johnson: That outfit makes me want to muoop all over your face.