[From Unix's yacc(1), ‘Yet Another Compiler-Compiler’, a LALR parser generator]
1. Of your own work: A humorous allusion often used in titles to acknowledge that the topic is not original, though the content is. As in ‘Yet Another AI Group’ or ‘Yet Another Simulated Annealing Algorithm’.
2. Of others' work: Describes something of which there are already far too many. See also YA-, YABA, YAUN.