GRASS ON phrasal verb [T] BRITISH AND AUSTRALIAN SLANG (esp. of a criminal) to secretly give information about (someone who has committed a crime) to the police; inform on (someone) Dan grassed on them to the local police.
phrasal verb [T] BRITISH AND AUSTRALIAN SLANG
(esp. of a criminal) to secretly give information about (someone who has committed a crime) to the police; inform on (someone)
Dan grassed on them to the local police.