Short for Molybdenum, has an atomic number of 42, (the true meaning of life, the universe, and everything according to Deep Thought, the computer from The Hitchhikers Guide to the Galaxy).
Oh, Mo, what would I do without you?
A mo is a certified time period that states no specific time length.
Player 1: I'll be on in a mo.
Player 2: Okedoke!
The most sexy motherfucker you have ever seen. He's so good at typing and getting all the labs and ladys and always there for the Boiz from being the best wing man and cooking for them always have a Mo in your friend group.
Mo Is one of the sexy Boiz in the world.
My robot lawnmower with googly eyes on.
Mo is my best friend
An inexpensive, inferior type of Ho.
Moes usually either perform worse or are nasty and discusting.
You take a Ho to a Hotel
You take a Mo to a Motel
Ho = Hotel
Mo = Motel