A fork of Rural Dictionary
Bob: Damn i'd sure like to cut Lisha's cake.
Joe: Dude, Lisha's your best friend's girlfriend. MFU!
Means "Mad For You." Used as a term of endearment and can usually be seen at the closing of a friendly letter.
"Have a wonderful day, darling! I'm simply MFU!"
Shit Flows Down, Money Flows Up
How things work. The rich get richer and the poor get the shaft.
A company goes bankrupt and everyone loses their pensions while the CEO and upper management get million dollar bonuses.
"Yeah, that's how it works, SFD/MFU."
How Tony Soprano describes the mafia. "Shit flows down, money flows up."