Look under the base of the tail at the chameleon's cloaca (where it poops from). A male will have a bulge behind the cloaca because this is where his hemipenis is located. A female will not have this bulge.
Yeah read the thread thought it might be a male but this is my first cham in over 10 years and Veiled chams is waht I had way back then... so Im no expert lol. Just curious, and wondering if my asumptions MIGHT be correct