It comes as improvised and, somewhere original though, to us, as the generations 'X' and 'Y' jabber with each other on campus and off it. But, certainly interesting, so to speak, is to hear them, mindlessly. Slang, when used as a noun, refers to nonstandard terms or nonstandard usages of standard terms. It is a kind of informal language that generally follows 'the grammatical patterns of the language from which it stems but that reflects an alternate lexicon with connotations of informality'. Slang provides different symbols from which communication messages can be constructed.
Slang is more than a noun though.
Also, like communication in general, slang is a process. This means slang is also a verb. We slang as well as speak slang. The process of slanging involves the creation and use of slang. It may entail both nonverbal and verbal cues.