I would call this a grammar shift in language
of the youth culture.

Abbreviations like LoL and ROLF and the smilies
can be categorised in the same ways as expressionl like "cool".

(German examples: knorke, krass, geil)

some will vanish, some will stay in a certain age-groups.
some will get into dictionaries. (like "to google")

Some small recent games of mine:
Griefer 4k http://damocles11.byethost9.com/griefer4k.html
Kobold 4k http://damocles11.byethost9.com/kobold.html
Cave 4k http://damocles11.byethost9.com/cave4k.html