What is Mackerel?
1.
A slang term representing one U.S. dollar, generally used amongst fellow poker players.
That bluff just cost me three hundred mackerels.
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2.
Mackerel is a common name of different fish species, mostly from the family Scombridae.
I'm not much of a mackerel snacker.
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3.
A state of (madness) achieved when a (scenario) pushs the boundaries of normal (humour). Mackerel Madness. An alternative approach to life, not excepting the social status quo. Unoffensive, yet inappropriate behavoir to alter generel perspective.
"That persons outfit and facial hair were Mackerel Madness"
Busking on a local bus service and jamming with the driver and passengers could be considered Mackerel Madness.
4.
An idiot, dickhead, mug etc
How are Chelsea better than Arsenal you fuckin Mackerel.