Georgia prosecutors clearly don't have a sense of humor -- they can't even tell the difference between a real death threat and a funny one ... so claims the guy who threatened to kill Mama June
Andrew Kurt Summers -- who now faces felony charges of making terroristic threats -- went on Facebook and threatened to shoot June and her daughter.
But Summers tells TMZ ... he was never serious. It was simply, as he puts it, "a joke, a dumb mistake."
Summers says he has no ill will toward the family. He says he was trolling her Facebook page because of the Mark McDaniel situation
. As for what he specifically wrote ... he won't say because the case is going to trial. Nor would he explain how a threat to shoot someone is funny.
Summers was in proximity of the Honey Boo Boo
clan. He lives just outside Atlanta, 2 hours from their home.
He's freaked out about the prospect of prison, saying he's a law abiding citizen with a clean record.
And clearly not that funny.