To be greggzoned, is to show a friend or friends the video, The Legend of Old Gregg. After the video is finished, the person give you a weird look, and then proceeds to shun you.
"Dude I showed my girl Old Gregg"
"Oh man that's true love, how'd she take it?"
"She just looked at me weird and then shunned me"
"Oh man you got Greggzoned, dump that bitch"