Originally military speak, translating directly as “LLMF,” this became an acronym for “Little Lost Mother F**ker.” It was later adopted by the tech world to refer to somebody (usually non-technical) who is in way over their head.
“We tried showing the boss how to use the new database, but he couldn’t even follow instructions well enough to get through the first two screens. After that, it was just Lima Lima Matt Foxtrot the whole way.”
by Nurse Kitten June 23, 2005