MABHA is a slang shortening for the idiom "Metel Ayri, Baydato, Halibeit Ayri", which is a commonly used idiom in Arabic written in Latin characters over the internet. It means "I do not give a f****" or "Couldn't care less" about a certain subject and can also be pronounced the way it is written.
by LebUrb October 15, 2018