In the UK the term "grass" (snitch) comes from London cockney rythming slang.
"grasshopper" was the term for a copper (police officer)
That's where "grass" came from.
Dont talk to him he's a grasshopper! 
Replying to @waronweakness
You learn something new everyday! 
10:50 AM - 23 Jul 2020
0 replies
0 retweets
1 like
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.