A "sweet grass" is when someone very slyly or indirectly snitches on someone.
"Who drank my Coke out of the fridge?"

A grass would say "I seen Mark take it"

A sweet grass would say "not me, why don't you ask Mark?"

"Was my boyfriend with you last night?"

A grass would say: "no, he was cheating on you with some girl he met at the pub"

A sweet grass would say: "no, he said he was going back to his girlfriend's house, I assumed he meant you, obviously not"
by Chrislfc5 March 26, 2021
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