An undefined velocity of an object in motion usually applying to something moving very quickly. Most often used when person using word is in an excited state of storytelling.
He was driving his truck at βmach chickenβ when he hit the meridian and launched his truck over the ditch.
75π 5π
3725.95 mph, the speed at which a human hand will cook a chicken in one slap
I was liek basically going mach chicken.
2π 4π