Blanker

Blanker is Dorset slang for a spark, a cinder.
Found on http://www.probertencyclopaedia.com/browse/ZB.HTM

Blanker

The standard Amiga screen blanker that comes with Workbench. It is names because it 'blanks' the screen; cutting down on the risk of still images damaging the monitor/TV.
Found on http://www.amigahistory.co.uk/b.html
No exact match found