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3.
A ladies' punany.

Word used frequently by Frank McCann in his most severe cases of Tourettes Syndrome.
Show's yer Grinner
by MikeB October 20, 2003
 
1.
One with a perverted or sexual sense of humor.
"Steve and his group of friends are nothing but insensitive grinners."
by D-Gilly March 13, 2010
 
2.
A Space Raider, Invader or interventionist spanning mainly the last decade in Invading the earth. An off planet being or Alien who lacks KNOWLEDGE. Colloquial slang also meaning YUL. Cockney rhyming slang is 'Yul Brinner' Grinner.
Let remove those YULs. They are not here for humanities benefit.

Which the same as 'Lets remove those Grinners' , ' Your Just a Grinner'
by ravrolend July 05, 2013
 
4.
The Australian band called Grinspoon.
"Let's listen to sum Grinner's."
by Diego September 05, 2003