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1.
A saying which you say to people on the street who you don't know
I am gonna talk to that guy, Hello Bob
by Mikeyman March 19, 2003
 
2.
A game in which when watching the Bob Newhart show the players drink an alcoholic beverage ever time it is said on the show, "Hello Bob." The game can be altered to match other shows.
At the party we played hello bob. I lost the game because I dropped my glass.
by River Willow January 12, 2011