I believe he meant big dick slanger not big dicks langer. Which I had never heard of the word langer until just now.
Slanger is a bastardization of slinger, as in one who slings something sling being throw, so big dick slanger is one who throws a big dick. Possibly into orifices or onto foreheads or something similar. However I am not sure what the original intent was, since I'm not BIGDICKSLANGER, and never would be(i'm petite in the crotch). ROFL
That's just my interpretation. And if anyone doesn't think I'm serious, I love telling people how their penis could never be as good as mine because girls think it's cute cuz it's so small.
I once got an ant pregnant. Not your Aunt, she's too big.