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Retarder

A retarder is a device used to augment or replace some of the functions of primary friction-based braking systems, usually on heavy vehicles. Retarders serve to slow vehicles, or maintain a steady speed while traveling down a hill, and help prevent the vehicle from "running away" by accelerating down the hill. They are not usually capable of bringing vehicles to a standstill, as their effectiveness diminishes as vehicle speed lowers. They are usually used as an additional "assistance" to slow vehicles, with the final braking done by a conventional friction braking system. As the friction brake will be used less, particularly at higher speeds, their service life is increased, and since in those vehicles the brakes are air-actuated helps to conserve air pressure too.

Friction-based braking systems are susceptible to "brake fade" when used extensively for continuous periods, which can be dangerous if braking performance drops below what is required to stop the vehicle – for instance if a truck or bus is descending a long decline. For this reason, such heavy vehicles are frequently fitted with a supplementary system that is not friction-based.

Retarders are not restricted to road motor vehicles, but may also be used in railway systems. The British prototype Advanced Passenger Train (APT) used hydraulic retarders to allow the high-speed train to stop in the same distance as standard lower speed trains, as a pure friction-based system was not viable.

The truck used the retarder while going down the hill.

by Huvudpersson July 24, 2017


Retarder

Stupider than retarded

Damn that boy retarder

by WhiteObama42069 August 24, 2021


Dogmatically Retarded

An insult meant for someone who would lay down their opinion as absolute fact despite being intellectually dishonest. Typically once their claim has been addressed, instead of engaging with the point, they will quickly blurt out something off the top of their head that usually will yet again be dishonest.

Jess has bad takes, he is dogmatically retarded.

by Barrack Hussein Obamna December 7, 2022


Retarded Fionn

A self proclaimed man who has a particular lust for unusual women. These women rang from being fat to transgender, or even black on occasions. A retard fionn is often known for his ability to write off a car in impossible circumstances

That man crashed his car with his transgender girlfriend. He’s such a retarded fionn.

by ShiftingGearsAndStompingQueers April 29, 2024


piss retarded

someone or something that is more than just retarded, it is the extreme version or next level of retardation

person 1.

dude, i just lost a game of rock, paper, scissors to Helen Keller

person 2.
man, that is piss retarded!

by proman7777 August 17, 2011


sphincter retardation

When your ass hole doesn't know whether it should shit or clamp up.

Bradley scared Andrew so bad that he had a case of sphincter retardation.

by Dizzy D. January 19, 2018


Ratchet Strap Retarded

The inability to use or comprehend the mechanism that is the ratchet strap

Yo, B the bike flew off the truck when we were taking it to the track last week because you are ratchet strap retarded.

by Derbygirl669 August 6, 2021