The short answer is no. Double male end “adapters” are illegal, dangerous and a fire hazard. If you have need of this type of adapter it means you’ve hung a string of lights backwards.
Every year we have people come in who already have their Christmas lights up and want to find a double male end plug. The problem is that they’ve ended up with the female end of the string of lights by the wall outlet, which is also a female end.
The reality is that there are no double male end plugs available on the market because they are dangerous. If someone has made you one, we’d advise you get rid of it, because it can shock you or someone else, plus it can short out on tinsel or any metal it comes in contact with and cause a fire.
Another solution is to plug both of the male ends into an extension cord long enough to reach the outlet. Be sure you are not chaining multiple extension cords together as that is a fire hazard. Your local Ace Hardware store will have a great selection of the cords, hangers and fasteners you need to make a sparkling light display.