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1.
CFZ
Care Factor: Zero
I can't believe you slept with my sister!

CFZ.
by therealvermifuge May 08, 2009
 
2.
CFZ
The collapsible friendzone, where you have friendzoned someone because you are both in relationships with other people but it can be broken at any time.
Did you hear about Emy and Quin? They're in a CFZ.
by EmyQuint5life November 24, 2013