When you do really good in a match as Support and your ADC complements you
while the enemy ADC calls you MVP http://vignette3.wikia.nocookie.net/glee/images/c/c5/Bestdayever.gif/revision/latest?cb=20131203055417
while the enemy ADC calls you MVP http://vignette3.wikia.nocookie.net/glee/images/c/c5/Bestdayever.gif/revision/latest?cb=20131203055417
Happened to me where the enemy ADC called me MVP but my ADC still flamed me.
Happened today when I was playing Kalista, my support was a Shaco. First I was like "Shaco support, well, let's see how it's going."
Then he began the murder fest. He was dealing so much damage, but didn't kill the enemies! He was serving me kills on a silver plate. All I had to do was to auto once and use E, boom, got a kill and could keep farming peacefully. I was trying to get Kalista mastery 7 for some days now, but struggled to get the last needed S. And this guy was just gifting it to me.
and then you still lose the game.