slangy

From slang +‎ -y.

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slangy (comparative slangier, superlative slangiest)

1. Including or given to slang.

   Synonym: (archaic) slangular

   Antonym: nonslangy

   His slangy speech was almost uncomprehensible to anyone over the age of 18.

   • 1862 January – 1863 January, M[ary] E[lizabeth] Braddon, “Fighting the Battle”, in Aurora Floyd. […], volume I, London: Tinsley Brothers, […], published 1863, →OCLC, page 224:

     [T]he names of places and horses and slangy technicalities of the turf, had interlarded the poor girl's brain-sick babble; […]

2. (dated) Loud in dress, manner, and conversation; flashy, vulgar.

• [John Camden Hotten] (1859), “SLANGY”, in A Dictionary of Modern Slang, Cant, and Vulgar Words, […], London: John Camden Hotten, […], →OCLC.