Adjective, : a slangy expression. ,slangy speech.    From Dictionary.com. 

Still, though, however contemptible (and blatant, insulting, blah blah blah) it was, Bush's lie had about it an appealing teenage slanginess.    From Wordnik.com.  [Ellis Weiner: A Tale of Two Georges] Reference

Its ominous English title is appropriate enough for its mood, except for the easy current slanginess of that phrase, mouthed by so many of us now on trivial occasions.    From Wordnik.com.  [At Least One Way] Reference

It's true that American academics tend to be more formal stuffier? than their current British counterparts, all stereotypes aside, although the current trend in British academic prose--rapid shifts from the formal to the informal register, occasional slanginess, offhanded walloping of other scholars--may be its own "form" instead of something truly "personal.".    From Wordnik.com.  [The Little Professor:] Reference

"Oh no; he's quite swell," said Mrs. Bowen, depriving the adjective of slanginess by the refinement of her tone.    From Wordnik.com.  [Indian Summer] Reference

As unavoidable circumstances forced one to take him, -- commonness, slanginess, appalling ignorance, and all, -- one could not leave him.    From Wordnik.com.  [T. Tembarom] Reference

Looking further down in the passage, the Greek doesn't have anything that suggests the slanginess of "go to all the trouble" or "point an accusing finger".    From Wordnik.com.  [Better Bibles Blog] Reference

Bettina Vanderpoel, who was the richest and cleverest and most promisingly handsome among them, was colloquial to slanginess, but she had a deep, mellow, child voice and an amazing carriage.    From Wordnik.com.  [The Shuttle] Reference

Whether they are recognized as slang will certainly depend in part on whether the occupation is familiar, though sometimes the familiarity will disguise, and sometimes it will conceal the slanginess.    From Wordnik.com.  [Slang.] Reference

He was the livelier of the two, and affected a slanginess of dress and talk and manner, a certain "horsey" style, very different from his elder brother's studied respectability of costume and bearing.    From Wordnik.com.  [Birds of Prey] Reference

He had been a fancy of hers; and the sort of affectionate respect with which Fulkerson spoke of him laid forever some doubt she had of the fineness of Fulkerson's manners and reconciled her to the graphic slanginess of his speech.    From Wordnik.com.  [A Hazard of New Fortunes — Complete] Reference

From his childhood he had known nothing but the fever heat of his "little old New York," as he called it with affectionate slanginess, and any temperature lower than that he was accustomed to would have struck him as being below normal.    From Wordnik.com.  [The Shuttle] Reference