Slang

Slang consists of a lexicon of non-standard words and phrases in a given language. Use of these words and phrases is typically associated with the subversion of a standard variety (such as Standard English) and is likely to be interpreted by listeners as implying particular attitudes on the part of the speaker. In some contexts, a speaker's selection of slang words or phrases may convey prestige, indicating group membership or distinguishing group members from those who are not a part of the group.

Few linguists have endeavored to clearly define what constitutes slang. Attempting to remedy this, Bethany K. Dumas and Jonathan Lighter argue that an expression should be considered "true slang" if it meets at least two of the following criteria:

Michael Adams remarks that, "[Slang] is liminal language... it is often impossible to tell, even in context, which interests and motives it serves... slang is on the edge." Slang dictionaries, collecting thousands of slang entries, offer a broad, empirical window into the motivating forces behind slang".

While many forms of language may be considered "sub-standard", slang remains distinct from colloquial and jargon terms because of its specific social contexts. While considered inappropriate in formal writing, colloquial terms are typically considered acceptable in speech across a wide range of contexts, while slang tends to be considered unacceptable in many contexts. Jargon refers to language used by personnel in a particular field, or language used to represent specific terms within a field to those with a particular interest. Although jargon and slang can both be used to exclude non–group members from the conversation, the intention of jargon is to optimize conversation using terms that imply technical understanding. On the other hand, slang tends to emphasize social and contextual understanding.

While colloquialisms and jargon may seem like slang because they reference a particular group, they do not fit the same definition, because they do not represent a particular effort to replace standard language. Colloquialisms are considered more standard than slang, and jargon is often created to talk about aspects of a particular field that are not accounted for in the standard lexicon.

...
Wikipedia