10 seconds flat 

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.

10 seconds flat by MOTHER FUCKING RAINBOW DASH August 7, 2011

10 Seconds Flat 

A common term of unknown origin, in which a person claims to be able to complete a task in 10.00 seconds. Existed long before the existance of My Little Pony: Friendship is magic

You see that tree over there? I can run there and back in 10 seconds flat.

10 Seconds Flat by Shiraga August 28, 2011