pessimizing compiler /pes'*-mi:z`ing k*m-pi:l'r/ n.
A
compiler that produces object [antonym of techspeak `optimizing
compiler'] code that is worse than the straightforward or obvious
hand translation. The implication is that the compiler is actually
trying to optimize the program, but through excessive cleverness is
doing the opposite. A few pessimizing compilers have been written
on purpose, however, as pranks or burlesques.