What is Fo Sho Doh?
to question the reality of a subject or to state the truth
Example 1-
"Man, is it fo sho doh that hes sleeping with her momma?"
"yea, major fo sho doh playa."
Example 2-
"That history test was hard."
"Fo sho doh."
See for real, fo shizzle, fo rizzle