The Scottish Government has provided £200,000 to the charity Scottish Language Dictionaries this year to publish an updated Concise Scots Dictionary. Scottish slang expressions such as dingie (to deliberately ignore), numpty (silly person) and cooncil curtains (boarded-up windows) could well be included in it, according to this Scotsman article.
Slang is the melting-pot of language, according to Professor Julie Coleman, the place where changes in the language occur most rapidly. For this reason, whilst some people see slang as a sign of creativity and independence, others see it as a symbol of moral decline. She also said that slang is difficult to research, since it is often out of date by the time it is published in a dictionary.
Some examples of Scots slang that may find their way into the dictionary are:
gadgie: bloke, man
ginger: fizzy drink
ned: coarse, uncultivated
spraff: to talk at length
More examples here in the full article.