stroker

Short definition from Wiktionary

Noun

1. 1
   One who strokes.
2. 2
   Something with which to stroke.
3. 3
   A four-stroke engine or by extension the vehicle itself; especially a motorcycle, as opposed to a two-stroke motorcycle (smoker).
4. 4
   A masturbator.
5. 5
   A loser.
6. 6
   A criminal, a trickster.

Proper noun

1. 1
   A surname.