Snoop Dogg blazed a massive blunt-type object on stage at a concert in Atlanta this weekend ... then passed it along to an eager audience member -- and TMZ has the photo evidence.

It all went down at a venue called the Tabernacle Saturday night ... Snoop smoked what appears to be a giant pot-filled cigar during his performance -- wild guess -- but then he spreads the love ... handing it to someone in the crowd.