Synonyms for Slang:

adj.

colloquial (adjective)
casual, colloquial, conversational, idiomatic, informal, vernacular.

n.

acrostic, americanism, anagram, anglicism, archaism, borrowing, chant, clue, Arabism, catch-all. cant (noun)
neologism, slanguage, Pseudology, shoptalk, franglais, Spanglish, pidgin English, study at dialect, Americanese, English as she is spoke.
casual dialect (noun)
argot, cant, colloquialism, jargon, lingo, neologism, patois, vernacular, shoptalk.
coinage (noun)
coinage, colloquialism, idiom.
language (noun)
argot, dialect, esperanto, grammar, jargon, language, lingo, parlance, patois, phrasing, rhetoric.
slang (noun)
argot, befool, cant, dupe, fool, gull, jargon, lingo, patois, put one across, put one over, vernacular, put on, take in, COD.

Other synonyms:

take-in
take in.
Other relevant words:
acrostic, americanism, anagram, anglicism, archaism, befool, borrowing, cant, chant, clue, dupe, fool, gull, neologism, put one across, put one over, Arabism, slanguage, put on, Pseudology, COD, shoptalk, catch-all, franglais, Spanglish, Americanese.

Usage examples for slang

  1. The prince frowned and made use of some military slang – The Adventures of Harry Richmond, Complete by George Meredith Last Updated: March 7, 2009
  2. " I love music," she cried, not understanding slang and I didn't explain it. – By Wit of Woman by Arthur W. Marchmont
  3. There is not a word of slang or anything modern; one quite understands how he was able to wake up the House of Lords before his legs gave way. – The Visits of Elizabeth by Elinor Glyn