In order to share with you some funny acronyms, it helps to understand the difference between abbreviations, initialisms, and acronyms.

When you shorten a word or phrase, you make an abbreviation. For example, these are abbreviations: NV for Nevada, tsp. for teaspoon, LN for Lane, NBC for the National Broadcasting Company, and radar for radio detecting and ranging.
Taking the first letter of the main words in a phrase makes an initialism. Examples are: PIN for Personal Identification Number, BBC for British Broadcasting Corporation, and UPC for Universal Product Code.
Acronyms are both abbreviations and initialisms. They are a very special kind of initialism, because they form a word. Here are the definitions of some of them: scuba for self-contained underwater breathing apparatus, JAG for Judge Advocate General, and OPEC for Organization of Petroleum Exporting Countries.
To sum up, initialisms and acronyms are abbreviations and use the first letter of the important words in a phrase or title. Acronyms are a distinct kind of initialism as the letters make a new word. Many people misuse the word acronym and use it for all initialisms, whether the letters make up another word or not.
Whenever you take the first letters of a phrase or title, you are bound two occasionally come up with some funny acronyms. Also, some acronyms stand for an amusing title or phrase. Here is a sampling of funny acronyms about cars:
The next set of funny acronyms are alphabetized and cover many topics:
The next group of acronyms is intriguing. They are all countries:
For a final twist, here are some acronyms for the word “ACRONYM”:
OK, some of those were not really funny, just interesting. If you want to try it yourself, just pick a word and make up a word for each letter.
Just for fun, here are some funny abbreviations and initialisms. Most of them do not make a word but are funny nonetheless. These are abbreviations that were found on hospital notes: