When you begin to run faster then you ever have before, so fast that your are faster then the world's quickest horse. As if you were eating the very same oats that the fastest horse was raised eating.
I don't buy the schmegegge about Morty sleeping with Moira.
His version of the story was pure schmegegge.
The whole schmegegge was made up to get Liz a little bit of attention.
Looking or experiencing something nice after witnessing something horrid like a disgusting gif or a disturbing video. Typically used as eye bleach are nice images of whatever makes the disturbed person happy.