It's used as an adjective to describe
something being
awesome, legendary, or ridiculously
awe-inspiring. It is usually preceded with an event that is unforgettable.
"Yo that
movie 'Dark Knight' was ShoMoney!"
"Did you hear about that billionaire?! It must be shomoney to have that much
money! "
"'How I met you mother' is soo shomoney."
"
Man! you were so shomoney last night at that party!"