Scarlet Speedster 

1. A fast redhead.

2. A tempting seductress with red hair.

3. Neat and tidy trimming of a (true) Redhead's pubes, giving the appearance of a small drag strip leading to her nether regions.

My dreams came true last evening when Lindsay took me home and proved, indeed, she was a scarlet speedster.

Scarlet Speedster by ButtFuzz August 16, 2006

Scarlet speedster 

A person usually refering to the meta-humans with impossible speed (like barry allen or jay garrick.etc) in the dc comics.

"Another scarlet speedster like myself"

Scarlet speedster by Ligma spreader 2000 April 15, 2019