This is the 6863rd most frequent Russian word.
абу
"АбУ" is not a standard Russian word. It might be a proper noun, abbreviation, or misspelling. Please clarify the context.
Here, "Абу" is used as a personal name to name a specific individual.
Мой друг Абу живет в Москве.
My friend Abu lives in Moscow.
In this sentence, "Абу" is still functioning as a proper name referring to an individual's actions.
Абу предложил нам отличный план по развитию проекта.
Abu proposed us an excellent plan for project development.
Again, "Абу" serves as a name within the context of a meeting.