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used to describe the speed of projectiles below Lightspeed and more than Mach 1
"The SR 71 went Mach fuck"
Mach fuck by TheAussiephallic April 17, 2024
Related Words
Speed of something that is going 20x escape velocity
"that manhole cover was going 20x the escape velocity. It went Mach Fuck."
Used to describe the absolutely ridiculous speed of something.

Often used in a joking manner in order to enhance the humor of a joke.

Most notably used to describe the speed of a well known manhole cover that a nuclear experiment launched into space.
An alien army got wrecked by a manhole cover traveling at mach fuck!

I love when someone hits me with a kraber while traveling at mach fuck.
Mach Fuck by Kilominum June 21, 2025

Mach Fuckass

When you're driving or riding any kind of motorcycle or car at a somewhat high speed, especially if you're in a hurry to get to like the bank on payday and you leave 20 minutes before they close.
I had to go mach fuckass in my car to make it to the bank and back on time today.

My dirt bike is so stupidly powerful, it's top speed is mach fuckass.
Mach Fuckass by Mach Fuckhead August 17, 2026

Mach Fuckass

Going stupidly fast for anything or driving any vehicle at a somewhat ridiculously fast speed but still doing so successfully.
I had to drive at mach fuckass to make it to the bank and back on time on my last pay day.

My dirt bike is so stupidly powerful, it's top speed is mach fuckass.
Mach Fuckass by Mach Fuckhead August 17, 2026
More from Urban Dictionary

square grouper

Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
square grouper by slipsheet November 6, 2004
Word of the Day on October 7, 2026
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
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