The difference between Grass up and Squeal
When used as verbs, grass up means to betray by informing on, whereas squeal means to scream with a shrill, prolonged sound.
Squeal is also noun with the meaning: a high-pitched sound, such as the scream of a child, or noisy worn-down brake pads.
check bellow for the other definitions of Grass up and Squeal
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Grass up as a verb (UK, slang):
To betray by informing on.
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Squeal as a noun:
A high-pitched sound, such as the scream of a child, or noisy worn-down brake pads.
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Squeal as a noun:
The cry of a pig.
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Squeal as a verb (ambitransitive):
To scream with a shrill, prolonged sound.
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Squeal as a verb (intransitive, slang):
To give sensitive information about someone to a third party; to rat on someone.