Being "called out" means that what you say, or what you say you can do, is not in reality what you actually know or can do. Make sense? If you have no idea what people are talking about, but make out like you do, sometimes the words you use will betray your level of knowledge.
Sometimes, all a person has to do is "touch" you to know if you have the "goods" - i.e. the ability to do what you say you can do...
So... consider yourself "called out"...