Today I found out what a backronym is (also commonly spelled bacronym).
In short, a backronym is when you treat a word that is not an acronym as if it was an acronym, constructing a phrase out of the word. For example: Delta – Doesn’t Ever Leave The Airport.
Backronyms are often used for humorous effect as in the example above, but they are also quite commonly used unintentionally.
For instance, many people believe the word “wiki” is an acronym for “What I Know Is”, but in fact it is not. The word ‘wiki’ is derived from the Hawaiian phrase “wiki wiki”, meaning ‘fast’. Thus used as: wiki – What I Know Is, makes this an example of a backronym.