It's a Southern expression indicating someone is of limited mental capacity.

@WilliamCharles Yea...I sometimes say God-dammit...or God bless you...I guess it's a sort of habit - evidence of brainwashing I had as a child.

Sadly, I think the meme maker was goofing on religionists. It's a common misspelling unfortunately.

@WilliamCharles Oh! I wasn't dissing you! Just making fun of the meme. Besides the misspelling in the meme, I've yet to see a religionist's rebuttal to an atheist statement on social media that wasn't riddled with misspellings and incorrect claims, to the point where I sometimes can't help but laugh, as they are calling us stupid. I try not to judge people on their spelling, unless they are trying to sound all high and mighty feeling a need "correct" me, haha!