good look or a statement that agrees with what was previously said

said to give encouragement to a person dropping mad knowledge.

"Preach" has no single meaning, but is used to convey a casual sense of affirmation, acknowledgement, Said in agreement, something that is real, absolute, well said, a person dropping mad knowledge,

Or to indicate that something has impressed you favorably.

Its usage among young blacks has been parodied ad nauseam among clueless suburban whites.

Seamore .... speak..... preach…….

1) Speak your mind!
2) religious term - Kirk Franklin keeps it real.

according to snoop dogg, when something good happened or u feel good, u say "Preach!" as a emotional expression.

It means sure, which is used widly used by Snoop Doggie Dog.