It is about as meaningful as SJW essentially in that it means what the user wants it to. It could mean everything that you said. Or it could mean someone who is a crass overgrown fratboy stereotype with no interests beyond money, alcohol, and sex and someone who works out and enjoys beer but can moderate themselves and have serious interests isn't one. It could be a flat out term of prejudice or cognitive armor to avoid listening to someone because they are too masculine.