The pronunciation of manigas is easy to pronounce. Instead of saying My Ni-ggahs, one says Ma-neegas spoken faster than usual to achieve that pronunciation (sound) of a military general saying "Manigas! Get me the President of the United States!
Often used to call one of your close friends without meaning any harm.
It is typically used as a replacement word for actual names/subjects/items/etc. Originated in the University of California, Irvine when a group of undergrad students in the fields of biology and engineering became extremely high.
King Leonidas: Madness?
King Leonidas: THIS IS MANIIGAAAAA!
King Leonidas: Where all the Manigans live!
Guy1: Hey! Manigas!
Guy2: Haha everyday.
Guy1: That was some good bud....Manigas.
Guy2: f'sho Manigas.
Guy1: Mr. Manigas! Where the fiends at?
Guy2: Haha, What up Manigas. *regular handshake goes here*
Cyrano: The apple doesn't fall far from the tree...Manigas.
Guy: An apple a day keeps the doctor away..Manigas