grass on
Report to authorities
To grass on someone is British slang meaning to inform against them, especially to police or authorities: He grassed on his mates to avoid prison time.
The informer is a grass.
The term carries strong connotations of betrayal—grassing violates codes of loyalty among criminals, schoolchildren, or any group where silence is expected.
- betrayViolate a trust
- squealShrill, piercing cry
- spill the beansReveal confidential information
- tattleReveal another's wrongdoing
- reportFormal written findings
rat out · snitch · tell on · reveal · inform · sell out · drop a dime · disclose · blab · tell tales · rat on · name names · expose · turn state's evidence · whistleblow · notify · dob · backstab
grass oncover for
Protect by deceiving
protect · shield · stand by · have someone's back · look out for
grass onkeep quiet
Remain silent
keep mum · say nothing · keep schtum · hold one's tongue · keep one's mouth shut
grass, grasses, grassy, grassland, grasslands, grassed, grassing