Slang is non-standard language, usual in casual and playful speech, made up of words and expressions where irreverence and humor prevail; such language is sometimes vulgar, and it is not considered appropriate for formal occasions. Jargon is the language and the vocabulary used in a particular trade, profession, or group. Slang & Jargon is a category of words and expressions that belong to a characteristic language, being either non-standard, ephemeral and playful (slang) or specialized technical terminology characteristic of a particular subject or group (jargon).