Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
GIGO [ˈgaɪgəu] abbr (COMPUT) (inf)(= garbage in, garbage out) МЗМП (= мяки́ну зало́жишь - мяки́ну полу́чишь)
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.