A term used by bronies when they boast that they can do something fast. It originated from ep. 1 of My Little Pony: Friendship is Magic when Rainbow Dash stated that she could "Clear all the clouds from the sky in 10 seconds flat"
Hey, I just beat your best time in Mario Cart!" "Meh, I could do it in 10 seconds flat.
de MOTHER FUCKING RAINBOW DASH 12 juin 2011