[ adj ] constituting or expressed in slang or given to the use of slang <adj.all> a slangy expressionslangy speech
Slangy \Slang"y\, a. Of or pertaining to slang; of the nature of slang; disposed to use slang. [Written also {slangey}.]
And there is a worry too about McLeish's translation: mostly admirably accessible and witty, it is sometimes so slangy that you feel the production is unnecessarily intent on convincing you that this is not some dusty old classic.
Those quotation marks are masterfully contemptuous, as if "violating the law" were some slangy and meaningless juvenile insult on the order of "having a spaz attack."