Industrial/Strike action. Usually involving the establishment and manning of picket lines.
Come on boys they have ripped us off enough, we are going out on the grass.
by Stueyg November 17, 2016
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British saying which means to inform the authorities about someone's misdeeds
Jonathan: Why were the police their Efe? Did u fucking grass on us? If I find out you did I will beat the shit out of you! No one likes a grass
by moonfizzle January 20, 2012
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to tell on/tell over/rat out some-one
Jane told Miss Stevens that Toby had smoked weed. By doing this she had GRASSED on him and can now be called a GRASS.
by xrachi-roox November 19, 2006
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a snitch, some one who tells to police/orthorities on someones dodgey acts.
john is a grass

john grassed me up for stealing mikes phone
by simondodo August 15, 2006
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