grass (on)

British slang
as in to tell (on)
to give information (as to the authorities) about another's improper or unlawful activities that bloke would grass on his own mater to save himself

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Cite this Entry

“Grass (on).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/grass%20%28on%29. Accessed 24 May. 2024.

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