look up any word, like bukkake:
 
1.
Trying to be an adult and giving speeches about serious things when you are still in high school and no one truly cares. The preacher also tends to spoil others' conversations by adding his/her own sermon.
Kakeson: Mike said he would never fight anyone maan.
J.Rich: I know man, I wish I could be like that.
David: Well... there comes a time when you have to give that stuff up and...(The other two leave)
by Kakeson March 31, 2005
 
2.
A term that can now not only be used to describe someone bitching at ya and telling you what to do but also to describe something that is great or chill or cool or dope or whatever... so yeah, preach on.
person 1: I just bought a dope cruiser bike at the thrift store so now im set for the summer

person 2: preachin' brutha!

friend 1: Shoooot me need practice my engrish today

friend 2: wow thats a preachin' idea
by diggabish May 23, 2013
 
3.
A conversation worth having,and spreading
Person one: 'I know where the drinks cabinet is at the party tonight'

Person two: 'Sweet,that's preachin'
by izdomville January 29, 2012