Fucking Four Letter Acronym. Generally used to illustrate to someone that they use too many TLAs.
Your presentation had so many TLAs in it, you should consider stepping up to FFLAs.
Acronym for Fuckin' Four Letter Acronym. Better than a TLA (Three Letter Acronym). See Government Agencies.
When I was your age, we were happy with TLA's. You kids with your FFLA's! Jesus!