From Longman Dictionary of Contemporary Englishmomo /məʊ $ moʊ/ noun [singular] British English spokenSHORT/NOT LONG a very short period of time SYN moment Wait a mo! I’ll be back in a mo.
Examples from the Corpusmo• And as Arnie S is on his hols at the mo, Turrican is the man to help.• He is however out injured at the mo and has no sign of returning.mo.mo. American English x-refthe written abbreviation of monthMOMO the written abbreviation of MissouriM.O.M.O. (also MO British English) /ˌem ˈəʊ $ -ˈoʊ/ noun 1 [singular]WAY/MANNER (modus operandi) a way of doing something that is typical of a particular person or group2 [countable] especially British EnglishMNPMA (medical officer) an army doctorFrom Longman Business DictionaryMOMO written abbreviation for MAIL ORDER; MONEY ORDER