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2.
A term used to demonstrate that you acknowledge someones achievements and praise them for their efforts.
"Man did you see that goal i just scored?"

"Yeah man, that had some pretty heavy flow!"

"Man I was going off on Friday night!"
"Yeah dude your flow was pretty heavy that night you were loose!"
by George Reaper October 09, 2011
 
1.
term to describe irregular quantities of vaginal discharge.
you ain't stackin flow w/ heavy flow
by Chafin June 27, 2006