the area of your body inbetween your asshole and your penis/vagina
Man Jackie sure loved it when i rubbed my lone gun man up and down her Grassy Knoll
by eric February 23, 2004
1 more definition
The hill by Emerson Lake in High River. Named by Wayne Fleury and his band of misfits and merrymakers.
Lets go chill at the grassy knoll in the van.
by jollydestroyer February 25, 2008