Top Definition
To break up with someone on facebook without notifying the person in real life.
Holy crap Minger and his girlfriend had a faceup, I knew before he did. What a tool bag.
by Korbdizzle August 28, 2008
the face u make when you eat something really sour or nasty; thiz face
man i couldn't help but face up when i tasted those sour skittles
by africaliberia March 07, 2009

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