A saying used when someone is ranting about something comparing their rant with a gospel preacher.
It can be a good or a bad rant, but the use of "Preach it sister" is often ironic.
Girl 1: I need feminism because rape.....
Guy 1: Preach it sister!

Guy 2: Xbox One is far superior to Playstation 4, its CPU...

Guy 3: Preach it sister!
by Mooseslayer June 13, 2014
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