Slang word meaning and definition

[noun] a characteristic language of a particular group (as among thieves); "they don't speak our lingo"
[noun] 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"
[verb] abuse with coarse language
[verb] fool or hoax; "The immigrant was duped because he trusted everyone"; "You can't fool me!"
[verb] use slang or vulgar language

\Slang\, imp. of {Sling}. Slung. [Archaic]
\Slang\, n. Any long, narrow piece of land; a promontory. [Local, Eng.] --Holland.
\Slang\, n. [Cf. {Sling}.] A fetter worn on the leg by a convict. [Eng.]
\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.
\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.

Morse code: ... .-.. .- -. --.