When Ben Silverstein is sent to the rundown town of Buttonville to spend the summer with his grandfather, he's certain it will be the most boring vacation ever. That is, until his grandfather's cat brings home what looks like .
Definition of momo. momo. noun. an unintelligent person; moron. Dates to the mid-1950s. The Random House Historical Dictionary of American Slang suggests it may be from a reduplication of the first syllable in moron or it may be from the dialectical Italian mammoccio meaning stupid rascal.
noun. 1  an unintelligent person; moron. 2  N. Used to refer to a police officer working at a mall.  3 momo is also a nickname.  1. The word Momo refers to motivation which is the reason or reasons one has for acting or behaving in a particular way.