go grassy knoll on someone
v. phr.— Note: To indulge in talk or thoughts of a possible conspiracy. «It’s probably nothing, and God knows I don’t want to go all grassy knoll on you. Just passing along the latest rumors.» —“Paranoia Watch” by Kevin Drum Washington Monthly: Political Animal March 31, 2007. (source: Double-Tongued Dictionary)
Further reading
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