1. [n]  a characteristic language of a particular group (as among thieves); "they don't speak our lingo"
2. [n]  informal language consisting of words and expressions that are not considered appropriate for formal occasions; often vituperative or vulgar; "their speech was full of slang expressions"
3. [v]  abuse with coarse language
4. [v]  fool or hoax; "The immigrant was duped because he trusted everyone"; "You can't fool me!"
5. [v]  use slang or vulgar language

1. \Slang\,
   imp. of {Sling}. Slung. [Archaic]
   
   

2. \Slang\, n.
   Any long, narrow piece of land; a promontory. [Local, Eng.]
   --Holland.
   
   

3. \Slang\, n. [Cf. {Sling}.]
   A fetter worn on the leg by a convict. [Eng.]
   
   

4. \Slang\, n. [Said to be of Gypsy origin; but probably from
   Scand., and akin to E. sling; cf. Norw. sleng a slinging, an
   invention, device, slengja to sling, to cast, slengja kjeften
   (literally, to sling the jaw) to use abusive language, to use
   slang, slenjeord (ord = word) an insulting word, a new word
   that has no just reason for being.]
   Low, vulgar, unauthorized language; a popular but
   unauthorized word, phrase, or mode of expression; also, the
   jargon of some particular calling or class in society; low
   popular cant; as, the slang of the theater, of college, of
   sailors, etc.
   
   

5. \Slang\, v. t. [imp. & p. p. {Slanged}; p. pr. & vb. n.
   {Slanging}.]
   To address with slang or ribaldry; to insult with vulgar
   language. [Colloq.]
   
         Every gentleman abused by a cabman or slanged by a
         bargee was bound there and then to take off his coat
         and challenge him to fisticuffs.         --London
                                                  Spectator.
   
   

1. R.A. Sibley. CACM 4(1):75-84 (Jan 1961).

2. Set LANGuage. Jastrzebowski, ca 1990. C extension with set-theoretic data types and garbage collection. "The SLANG Programming Language Reference Manual, Version 3.3", W. Jastrzebowski <wojtek@loml.math.yale.edu>, 1990.

3. Structured LANGuage. Michael Kessler, IBM. A language based on structured programming macros for IBM 370 assembly language. "Project RMAG: SLANG (Structured Language) Compiler", R.A. Magnuson, NIH-DCRT-DMB-SSS-UG105, NIH, DHEW, Bethesda, MD 20205 (1980).

4. "SLANG: A Problem Solving Language for Continuous-Model Simulation and Optimisation", J.M. Thames, Proc 24th ACM Natl Conf 1969.