(transitive, slang) To render unconscious; to knock out.
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(UK, slang) Completely asleep or unconscious.
2008, Michael Lutwyche and Steven Fowler, Hardcore, VHC Publishing, "Birmingham City Vs Aston Villa Division 2 12th December 1987":
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Add your own interpretation of "spark out".
Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
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