Top definition
Someone who will win 1st in every 100meter race(e.g. Usain Bolt).

A very fast person.
Maddi:Did u know Jonathan went undefeated in the 100!?
Jazmin:No wow what a speedster!

Anthony:Usain Bolt just beat the world record!
Rashad:Yup he's a speedster.
by SixPackjonny August 05, 2010
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2
People whom need to build up their confidence with the help of speeding machines, due to their small penises.
Asian speedsters are often seen small stature.
by Peevee August 10, 2006
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The vengeful act of crapping on a lover's chest while they sleep.

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