Jargon is a special way to use words that are shared only by a certain group of people. They may not mean what the dictionary says they mean. They have different meanings to the people using them than their everyday meaning.
For example, the ordinary words boot, net, and web also have special meanings for users of computers, the Internet, and the World Wide Web. These, and to flame, to ping and many acronyms are part of net jargon.