Informal abbreviations

There are plenty of informal abbreviations, or shortenings of words out there. We don't really think about these that much in everyday life, but do you consider that they can be harmful to the English language?

Here are some examples and their meanings:

diff - as in "What's the diff?" - difference
Analysis: 1 syllable saved

refi - as in "Refi now!" - refinance
Analysis: 2 syllables saved

Notice we are dealing strictly with spoken word, not written. Abbreviations like i.e, etc., are perfectly acceptable.

These abbreviations would not be appropriate in a formal setting such as a meeting. Similar to verbification that was discuss in the previous post, these kinds of informal abbreviations demonstrate that we can get lazy over language. These abbreviations should only be used colloquially and hopefully never become actual words.