On the motor 

Automotive/racing term. Denotes a vehicle running/racing WITHOUT nitrous oxide assistance.
Synonym: "On nuts".
Antonyms: "On the bottle", "On spray", "Juicing it", "With NOS".

"That car runs the quartermile in 10.1 seconds on the motor; but it does 8.9 on spray".

On the motor by Dr. DVS January 8, 2009

Motorhead 

The baddest metal band on the planet.

Motorhead fuckin rocks!

Motorhead by rocker July 18, 2003

motor mouth 

Someone who never shuts up, excessive chatter.

Brock is such a fucking motor mouth, my fucking ears are hurting.

motor mouth by John Harrison October 19, 2004

motoreturnus profundus 

An inexplicable, curiously concerning behaviour frequently demonstrated by individuals with near-pathologic emotional, physical (and possibly spiritual) attachment to a specific vehicle, often a motorcycle--that, once relinquished either by sale or trade, creates such tremendous internal loss-aversion that any and all measures are taken to restore possession, often at financial detriment.

Ok, that's the FIFTH fuckin' time that he's either traded or sold that damn Harley only to chase down the new owner in remorse. Each time he's lost money, time and self-respect...but it sure is entertaining watching the motoreturnus profundus!

motoreturnus profundus by YAWA May 5, 2017

Momoring 

A nickname given to Hirai Momo.
Hirai Momo is a member of South Korean-based girl group called Twice.

"Momoring looks so cute!"

Momoring by thatkpopstanfromlongisland June 17, 2021

Fat Man On A Motorbike 

A game played on long car journeys. The aim is to spot fat men on motorcycles.

Once you spot one, you shout out 'Fat man on a Motorbike'.

This game can pass time, and winning can be very satisfying.

Joe: 'FAT MAN ON A MOTORBIKE!'

Darren: 'Yass! Let's start a new round.. cannot wait!'

--

Kid: 'But I can't be fucked going on a 2 hour car journey to see a wretched old shrivel in a hospital bed!'

Dad: 'Quit whining. Play fat man on a motorbike with Garry or something. And don't talk shit about my maw.

Fat Man On A Motorbike by Har-Har August 17, 2010

motor mouth mildrid 

an old hag who rambles about fantasies of knowing mob, celebrities, anyone famous.

Mildrid: I know John Gotti Jr oh hun a plate of spaghetti

Mildrid: I had dinner with George Bush hun and we went to his ranch in texas
Mildrid: I have 10 billion dollars hun i dont need anything

Mike: Goddamn motor mouth mildrid shit the fuck up!
Mildrid: What? ::launches off into another fantasy dweller diatribe::

motor mouth mildrid by MrYellowTeeth47 April 15, 2023