Here is a few I can think of, I was told there are more, go ahead and list as many as you can think of.  There are no wrong answers here so have fun but try to keep it clean!?  I don't think any of these agencies are watching, lol or are they?

Here are some examples;

CIA-Clowns In Action

FBI-Federal Bureau of Illusions

IRS-International Rat Society

I think CIA means cash in advance.

Christmas in April

Caught in Action

Federal Bureau of Intoxication (for Trysts and me)

Full Blown Insanity

Chess In America

It Really Stinks

Inmate Roommate Soulmate

Chess Is Awsome

Chaos Is Around

Lol alright Dragon, good to hear from you!

Irritable Rectum Syndrome 

Famous But Invisible

Cash Is Allowed

Fake Batteries Included

Fat Bald Idiots

Fame Beats Insecurity

Income Restriction Society

Incredibly Reduced Salary

Chronic Income Abusers